The Ultimate Guide to Women's Lingerie Sizes in Australia

Table of Contents

1. Why Lingerie Sizing Actually Matters

2. How to Take Your Measurements Correctly

3. Understanding the Australian Lingerie Size System

4. Lingerie Size Chart: AU Sizes Explained

5. How to Find Your Bra Size in Australia

6. Sizing for Different Lingerie Styles

7. Plus Size Lingerie: Your Complete Guide

8. International Size Conversions

9. Common Lingerie Sizing Mistakes (And How to Avoid Them)

10. How Fabric and Style Affect Your Fit

11. Sizing for Bridal Lingerie

12. How to Care for Your Lingerie So It Keeps Its Shape

13. FAQ: Your Lingerie Sizing Questions Answered

14. Shop Your Size at Lingerie Seduction

Why Getting Your Lingerie Size Right Changes Everything 

You've probably had the experience: you choose and order a gorgeous piece of lingerie online, it arrives, and something is just… off. The band rides up. The cup gap. The G-string sits awkwardly at the hip. You're not imagining it — and it's almost never your body that's the problem.

The real culprit? Sizing confusion.

Lingerie sizing in Australia is genuinely different from the US, UK, and European systems. Add in the fact that different styles — bra sets, bodysuits, corsets, babydolls — each require a slightly different approach to sizing, and it's easy to see why so many women end up with lingerie that doesn't make them feel the way it should.

This guide is here to fix that. By the time you've read it, you'll know exactly how to measure yourself, which size to choose at Lingerie Seduction, and how to navigate sizing differences across every style in our collection — from lace bra sets to plus-size lingerie.

Because the right fit isn't just about comfort. It's about confidence. And confidence is exactly what great lingerie is supposed to give you.

How to Take Your Measurements Correctly 

Before you look at any size chart, you need three measurements: your bust, your waist, and your hips. These three numbers unlock every size in our collection.

Here's how to measure accurately at home.

What you'll need: A soft fabric measuring tape (not a metal ruler), a mirror, and ideally someone to help you. If you're measuring alone, a mirror makes a big difference.

What to wear: Measure in your underwear or a non-padded bra — not over clothing. Layers add centimetres that will throw off your size.

Bust Measurement

Wrap the tape measure around the fullest part of your chest — this is usually across your nipples. Keep the tape parallel to the floor, snug but not tight. Don't hold your breath or pull the tape too firmly. Record in centimetres (cm).

Waist Measurement

Find your natural waist, which is the narrowest part of your torso — typically about 2–3 cm above your belly button. Breathe out naturally, then measure. Don't suck in. Your natural waist is what it is, and lingerie is designed to work with real bodies.

Hip Measurement

Stand with your feet together. Measure around the widest part of your hips and seat — usually about 20–23 cm below your natural waist. Keep the tape level all the way around.

Underbust Measurement (For Bra Sizing)

For bras specifically, you also need your underbust: the measurement directly under your bust, where your bra band sits. Breathe out and measure snugly (but not so tight it's uncomfortable).

Write all your measurements down before moving on. These numbers are your starting point for everything that follows.

Understanding the Australian Lingerie Size System 

Australian women's sizing uses a different numeric scale than the US and UK. This catches a lot of shoppers off guard — particularly when ordering from brands that don't clearly state which country's sizing they use.

At Lingerie Seduction, all sizing is listed in Australian sizing. This means:

• AU size 6–8 = XS/S

• AU size 8–10 = S/M

• AU size 10–12 = M

• AU size 12–14 = L

• AU size 14–16 = XL/XXL

When you see "one size fits XS–M" on a product listing, that refers to Australian sizing. This is important to keep in mind if you've ever purchased from US or UK brands and found the sizing confusing — it's likely because you were comparing across systems without realising it.

Lingerie Size Chart: AU Sizes Explained 

Use the chart below as your primary reference for all non-bra lingerie styles at Lingerie Seduction — including teddies, bodysuits, babydolls, chemises, lingerie sets, and robes.

 

Example: If your bust is 92 cm, your waist is 75 cm, and your hips are 101 cm, you would typically wear an AU size 12 or a Medium at Lingerie Seduction.

Between sizes? Always size up. Lingerie with stretch fabric will accommodate a smaller measurement easily; it's much harder to look and feel great in a piece that's too tight.

Lingerie Seduction Tip: Our pieces are designed to fit an average bust range of B to D cup. If you fall outside this range, our team is happy to help you find styles that will work for your shape — just email us at support@lingerieseduction.com.au before ordering.

How to Find Your Bra Size in Australia 

Bra sizing works differently from general lingerie sizing. Instead of a single size label, bra sizes use a band number + cup letter combination — for example, 12B or 14D.

Here's how to calculate yours.

Step 1: Find Your Band Size

Measure your underbust (directly under your bust) in centimetres. Then use this conversion:

Step 2: Find Your Cup Size

Measure your bust (fullest part of chest) and subtract your underbust measurement. The difference in centimetres determines your cup size:

Step 3: Combine for Your Full Bra Size

If your underbust is 72 cm (band size 12) and the difference between your bust and underbust is 16 cm (cup size C), your bra size is 12C.

Signs Your Bra Doesn't Fit

Even if the size "sounds right," your bra may still be the wrong fit. Watch for these common fit issues:

Band too loose: The band rides up at the back. A correctly fitted band should stay horizontal and firm — you should be able to fit two fingers underneath it, but no more.

Band too tight: The band digs in, leaving red marks or causing the flesh to bulge over the back. Go up a band size.

Cups too small: Breast tissue spills over the top or sides of the cup (known as "quad boobing" or "side spillage"). Try a larger cup.

Cups too big: The cup fabric puckers, wrinkles, or gaps away from your skin. Drop down one cup size.

Underwire pressing on breast tissue: If the underwire doesn't sit flat against your ribcage at the sides and centre, the cup size is likely too small.

Sizing for Different Lingerie Styles 

Not all lingerie fits the same way — and sizing strategies differ depending on the style. Here's a breakdown by style type.

Lingerie Sets (Bra & Panty)

For matching lingerie sets, you'll be sizing two separate pieces — a bra and underwear — which may not necessarily be the same size. Use your bra sizing calculation for the top and your hip measurement for the bottoms. Most lingerie sets at Lingerie Seduction are designed so that the sizes correspond (e.g., a 12C bra will pair with a size 12 brief), but always check each piece individually.

Bodysuits & Teddies

Teddies and bodysuits need to fit your torso length as well as your bust, waist, and hips. If you're between sizes, consider your torso length — if you're tall or have a long torso, sizing up ensures the crotch snap doesn't pull uncomfortably. If you're petite, sizing down from your hip measurement often gives a better fit. Most bodysuits in our collection have some stretch, which helps accommodate the fit.

Babydolls & Chemises

Babydolls and chemises are the most forgiving, least restrictive styles when it comes to sizing. Because they skim over the body rather than hugging it, they tend to fit a wider range comfortably. Size based on your bust measurement — babydolls that fit well across the chest will naturally fall over the rest of the body. If you're larger in the hip than the bust, check the product description to see if the garment is empire-waisted or A-line (which will give more room through the skirt).

Corsets & Bustiers

Corsets are the most fit-critical lingerie style. Unlike other pieces, corsets are sized primarily by waist measurement, and the sizing is more precise. A corset should sit firmly around your torso — that's what gives it its shape-defining effect. A corset that's too large won't provide structure; one that's too small may restrict your breathing.

For first-time corset buyers: choose your natural waist measurement and match it to the corset's listed waist size. If you're between sizes and looking for a more dramatic silhouette, you can size down by 2 cm and lace the corset loosely at first to break it in — this is called "seasoning" a corset.

G-Strings & Panties

For G-strings, thongs, and briefs, size is based on your hip measurement. The elastic should sit comfortably without digging in. At Lingerie Seduction, underwear sizing follows standard AU sizing: size 8 for hips around 86–91 cm, size 10 for 91–96 cm, size 12 for 96–101 cm, and so on.

Robes & Wraps

Robes are intentionally relaxed in fit — they're designed to drape elegantly, not hug your body. Size based primarily on your bust and shoulder width. If you prefer a more generous coverage, size up by one.

Faux Leather Lingerie

Faux leather has limited stretch compared to lace or mesh. For faux leather bra sets, bodysuits, and harnesses, sizing accuracy is especially important. Measure carefully and size up if you're between sizes — faux leather won't give the way softer fabrics do, so a slightly larger size will be more comfortable and will photograph better.

Plus Size Lingerie: Your Complete Guide 

Everybody deserves beautiful, well-fitting lingerie — and that's not just a platitude. It's a design philosophy that should be built into every collection. At Lingerie Seduction, our plus-size lingerie range covers AU sizes 16–20+ across a range of styles, including sets, teddies, and babydolls.

Sizing Tips for Plus-Size Lingerie

Prioritise stretch fabrics. Lace, mesh, and stretch satin all accommodate a wider range of measurements and are more forgiving than woven or structured fabrics. These styles will also give you that luxurious, second-skin effect that makes lingerie feel genuinely seductive.

Measure fresh each time. Bodies change — weight fluctuates, and measurements shift over months or years. Don't assume your size from last year is still your size today. Take fresh measurements before each purchase.

Look for adjustable features. Adjustable straps, hook-and-eye closures, and stretchy waistbands give you flexibility to fine-tune the fit once the piece arrives.

Don't size up "just in case." This is a common mistake. Lingerie that's too large will sag, bunch, and lose its shape — making it look far less flattering than a correctly sized piece in a stretch fabric. Trust your measurements.

Consider the cut. Empire waist babydolls and chemises are universally flattering for plus-size figures — they highlight the bust and skim elegantly over the waist and hips. Lingerie sets with high-waisted briefs offer coverage and a smooth silhouette. Bodies are cut to flatter curves and are a standout choice if you want a sleek, all-in-one look.

If you need help selecting a style for your body type, contact the Lingerie Seduction team at support@lingerieseduction.com.au. We're genuinely happy to help — our team has had hundreds of these conversations, and we'll give you honest, personalised advice.

International Size Conversions 

If you've purchased lingerie from US, UK, or European brands before, you'll know that the sizing systems don't line up neatly. Here's a comparison guide.

General Clothing Sizes

Bra Size Conversions

Bra sizing is where international differences get particularly complex. Australian bra sizing is shared with the UK, but differs significantly from US and European sizing.

 

Cup sizes: AU and UK cup sizes are the same (A, B, C, D, DD, E, F...). US cups run smaller — a US D is roughly equivalent to an AU/UK C. European cups use a slightly different lettering system.

Important: When shopping at Lingerie Seduction, you don't need to convert — all our sizes are in Australian sizing. But if you're used to buying US lingerie and referencing those sizes, keep this table handy.

Common Lingerie Sizing Mistakes (And How to Avoid Them) 

Here are the lingerie sizing mistakes we see most often — and the easy fixes for each.

Mistake 1: Going by Clothing Size Alone

Your dress size and your lingerie size are not the same thing. A woman who wears an AU size 12 dress might need a size 10 bodysuit (because bodysuits are more fitted) or a size 14 corset (because corsets require precise waist measurements). Always start from your measurements, not your clothing tag.

Mistake 2: Measuring Over Clothing

Every layer of fabric adds centimetres to your measurement. Always measure against your skin (or a thin bralette at most) for accurate numbers.

Mistake 3: Using Old Measurements

Measurements change with weight fluctuations, pregnancy, changes in fitness, and even just time. If you haven't measured yourself recently, do it again before your next purchase.

Mistake 4: Ignoring Stretch Instructions

When a product description says "stretch fabric" or "one size fits XS–M," that means the garment is designed to stretch across a range of measurements. Don't assume it will only fit the smallest size — stretch lace and mesh are engineered to accommodate a range.

Mistake 5: Picking the Tighter Size for Bras

Many women wear bra bands that are too large and cups that are too small. The band provides 80% of a bra's support — if it's loose, you're relying on your straps, which causes shoulder strain and poor shape. When in doubt, size down in the band and up in the cup.

Mistake 6: Not Checking the Product-Specific Size Notes

At Lingerie Seduction, individual product pages include specific sizing notes when a style runs differently from our general size chart. Always read these before ordering — it takes 10 seconds and saves you a potential return.

How Fabric and Style Affect Your Fit 

Two pieces with identical size labels can fit very differently depending on what they're made from. Understanding how fabrics behave helps you predict fit before a garment arrives.

Stretch lace: The most common material in our collection. Stretch lace conforms to your body and is highly forgiving across a 2–3 size range. It's comfortable against the skin and holds its shape well with proper care.

Mesh and sheer fabrics: Similar to stretch lace in terms of stretch and give. Sheer mesh is very delicate — check your measurements carefully for mesh bodysuits, as the fabric can distort if stretched too far.

Satin and silk-touch fabrics: Limited stretch. These fabrics drape beautifully but have less give than lace or mesh. Sizing accuracy matters more with satin-touch lingerie — if in doubt, size up.

Faux leather and vinyl: Minimal to no stretch. Size for your largest measurement (bust or hip, depending on the style). A faux leather piece should feel snug but not restrictive. This is also the one category where "snug" can look fantastic — the structure of the material creates its own shaping effect.

Cotton and jersey: Most common in sleepwear and everyday underwear. These fabrics have moderate stretch and are very comfortable. Sizing is fairly true to the label.

Underwire bra cups: The cups are non-stretch (that's the point — they're structured to hold shape). Size these precisely based on your cup calculation. The band may have a little stretch, but the cups won't accommodate sizing errors.

Sizing for Bridal Lingerie 

Your wedding night lingerie deserves special attention. It's one of the few times most women invest in a truly special piece — and you want it to fit perfectly.

At Lingerie Seduction, our bridal lingerie collection includes white and ivory teddies, lace sets, babydolls, and robes designed for the occasion.

Here's how to approach bridal sizing specifically:

Order early. Don't leave it to the week before. Order at least 3–4 weeks ahead so you have time to exchange or alter if needed.

Account for your wedding dress undergarments. If you're wearing shapewear, a specific bra, or a structured corset under your dress, your measurements on the day may be slightly different. Measure your wedding-day undergarments where possible.

Consider comfort alongside aesthetics. The most beautiful piece in the world won't feel magical if it's uncomfortable after 20 minutes. Prioritise fit, then style.

Lace teddies are the most popular choice for wedding nights — they're elegant, universally flattering, and available in a wide size range. Our white crotchless teddy is a perennial favourite.

Don't wash bridal lingerie before the occasion. First wears of delicate fabrics always feel their best — washing can change the texture slightly. If you need to check the fit, try it on carefully without washing first.

How to Care for Your Lingerie So It Keeps Its Shape 

The right care routine extends the life of your lingerie and keeps the sizing consistent — because a badly cared-for piece will stretch out of shape and never fit the same way again.

Hand washing is always best. Use cold or lukewarm water and a gentle detergent (or specific lingerie wash). Gently squeeze water through the fabric — don't twist or wring.

If machine washing: Always use a mesh lingerie bag and select the delicates or gentle cycle with cold water. Never machine wash anything with an underwire without a bag — the wire will bend and distort.

Never tumble dry lingerie. Heat degrades elastic, shrinks fabrics, and warps underwires. Lay flat on a clean towel to dry, or hang gently on a line away from direct sunlight.

Store flat or loosely folded. Don't stuff bras into a drawer — the cups will lose their shape. Nest them together (upright, with one cup inside the other) or store them flat.

Keep faux leather away from heat. Faux leather can crack or peel if exposed to high temperatures or harsh detergents. Wipe clean with a damp cloth and air dry.

FAQ: Your Lingerie Sizing Questions Answered 

Q: I'm between sizes — which should I choose?

As a general rule, size up. Lingerie that's slightly large can still look and feel great, especially in stretch fabrics. Lingerie that's too small is uncomfortable and tends to look unflattering. The exception is corsets, where you should match your exact waist measurement.

Q: The model in the product photo looks much smaller than me. Will the lingerie still suit me?

Yes. Most lingerie styles in our collection are available in a range of sizes, and what works on one body type works beautifully on many. If you're unsure, our team can walk you through which styles are most flattering for your measurements.

Q: Do I need to measure every time I shop, or can I use the same size as before?

Measurements can change. If it's been more than a few months, or if your weight has shifted, re-measure. It only takes a few minutes and saves a potentially disappointing order.

Q: I normally wear a size 16 in Australian clothing, but it says your plus-size lingerie goes to size 20 — do you have anything for me?

Yes. Our size 16 in lingerie corresponds to an XL. Use the size chart above to confirm your measurements align with that label. If you're closer to a 16–18, check the XL/XXL row in our chart.

Q: What if my measurements fall in between two size categories?

Identify which measurement is the "tightest" fit — for example, if your bust sits in the M range but your hips land in the L range, go with L. Lingerie accommodates a smaller measurement easily, but can't accommodate one that's too large.

Q: I ordered the right size, but the bra band keeps riding up — what's wrong?

This usually means your band is too large. Try the next size down in the band and the next size up in the cup (this is called "sister sizing" — a 12D and 10DD have the same cup volume but different band sizes). The band should be firm enough to stay horizontal across your back.

Q: Can I contact someone at Lingerie Seduction for personalised sizing help?

Absolutely. Reach out to us at support@lingerieseduction.com.au. We offer personalised recommendations based on your measurements and the style you're interested in — it's a service our customers consistently rate as helpful, and we're happy to assist.

Shop Your Size at Lingerie Seduction 

Now that you know exactly how to find your size, you're ready to shop with confidence.

At Lingerie Seduction, every piece is selected with real women in mind — designed to celebrate your body, your mood, and your moment. Whether you're shopping for a date night, your wedding, or simply because you deserve something beautiful, we have the size and the style.

Here's where to start:

• Lingerie Sets — matching bra and panty sets for every size and occasion

• Teddies & Bodysuits — all-in-one styles in sizes XS through XXL+

• Plus Size Lingerie — curated styles for AU sizes 16 and above

• Bridal Lingerie — luxe pieces for your most memorable moments

• Babydolls & Chemises — the most forgiving and elegant silhouette in lingerie

• Corsets & Bustiers — structured, shaping styles sized for your waist

Not sure where to start? Check our Size Guide, or contact our team for a personalised recommendation.

You've got the knowledge. Now go find and buy womens lingerie that makes you feel like your best self.

Still have questions about sizing? Email our team at support@lingerieseduction.com.au — we're here to help you find your perfect fit.

Related Reading:

• How to Choose Lingerie for Your Body Type

• The Best Lingerie Styles for a Special Occasion

• Bridal Lingerie: A Complete Shopping Guide for Your Wedding Night

• Lingerie as Self-Care: Why the Right Fit Changes How You Feel

Lingerie Seduction is Australia's premier online lingerie store. We ship Australia-wide with fast dispatch, discreet packaging, and easy returns. Shop the full collection here.