Getting your measurements right is the single most important step to finding shapewear that works. For a full overview of shapewear styles by body type, see our Best Shapewear for Every Body Type: A Complete Guide (2026).

How to Measure Yourself for Shapewear: The Complete UK Sizing Guide

The most common shapewear complaint — rolling, digging, bunching, or not smoothing at all — almost always comes down to one thing: the wrong size. Shapewear sizing isn't like clothing sizing. A size 12 in a dress doesn't automatically mean a size 12 in shapewear. Getting your measurements right before you buy is the single most important step to finding shapewear that actually works.

What You'll Need

• A soft fabric measuring tape (not a metal one)
• A mirror, or a friend to help
• Form-fitting clothing or bare skin for accurate readings

The Key Measurements

1. Waist
Measure around the narrowest part of your torso — usually about 2–3 inches above your belly button. Keep the tape parallel to the floor and snug but not tight. Don't hold your breath or pull in your stomach; measure as you naturally stand.

Used for: high-waist briefs, waist trainers, bodysuits, shaping shorts

2. Hips
Measure around the fullest part of your hips and bottom — usually about 8–9 inches below your natural waist. Keep the tape parallel to the floor and make sure it passes over the fullest point of your seat.

Used for: shaping briefs, shorts, bodysuits, full-body shapers

3. Bust
Measure around the fullest part of your chest, keeping the tape parallel to the floor. Don't compress the tape — it should be snug but not tight.

Used for: bodysuits with built-in bra support, full-body shapers

4. Torso length (for bodysuits)
Measure from the top of your shoulder, down over your bust, through your crotch, and back up to the starting point. This is your full torso circumference and helps determine whether a standard or short-torso bodysuit will fit correctly.

Used for: sculpting bodysuits, full-body shapers

How to Use Your Measurements

Once you have your measurements, compare them against the size guide on each product page — not against your usual clothing size. Shapewear brands size differently, and even within our range, different styles may fit slightly differently based on their construction and compression level.

If you're between sizes: size up. Shapewear that's too small will roll down, dig in, and create bulges above the waistband — the opposite of what you want. Sizing up gives you the smoothing effect with the comfort to wear it all day.

If your waist and hips fall in different size brackets: choose the size that fits your larger measurement. A bodysuit that's too tight across the hips will roll, dig in, and be deeply uncomfortable, while one that's slightly looser at the waist can still provide excellent smoothing.

Common Sizing Mistakes to Avoid

• Measuring over thick clothing — always measure over bare skin or thin, form-fitting clothing
• Pulling the tape too tight — this gives an artificially small measurement and leads to ordering too small
• Using your dress size — shapewear sizing is based on body measurements, not clothing size
• Ignoring torso length for bodysuits — this is the most common cause of bodysuit discomfort

A Note on Compression and Fit

Higher compression shapewear will feel tighter than lower compression at the same size — this is normal. If you're new to shapewear, start with a medium compression style in your correct measured size. Once you're comfortable with how shapewear fits and feels, you can explore firmer compression options. Read our Shapewear Compression Levels Explained guide for a full breakdown of light, medium, firm and extra-firm options.

How to Check Your Fit Once It Arrives

Once your shapewear arrives, here's how to know if the size is right:

• Correct fit: smooth, even compression with no digging, rolling, or visible lines. Comfortable to wear for several hours.
• Too small: waistband rolls down, fabric digs into skin, visible bulging above or below the garment edges.
• Too large: fabric wrinkles or sags, little to no smoothing effect, garment shifts during wear.

Frequently Asked Questions

Should I size up or down in shapewear?

Always size up if you're between sizes. Shapewear that's too small will roll, dig in, and create bulges — the opposite of the smooth silhouette you're after. Sizing up gives you effective smoothing with the comfort to wear it all day. The only exception is waist trainers, where a snug fit is part of the design — but even then, you should never size down beyond your measured size.

Can I use my dress size for shapewear?

No — shapewear sizing is based on body measurements, not clothing size. A size 14 in one brand's shapewear may be a size 16 in another's. Always measure your waist and hips and compare against the specific product's size guide before ordering.

How do I measure for a waist trainer?

For a waist trainer, the most important measurement is your natural waist — the narrowest point of your torso, usually 2–3 inches above your belly button. Measure while standing naturally, without holding your breath. Compare your measurement against the waist trainer's size guide. Browse our full Waist Trainers collection for styles with detailed size guides.

What if my waist and hips are different sizes?

Choose the size that fits your larger measurement. For most shapewear styles, the hips are the critical fit point — a garment that's too tight across the hips will roll, dig in, and be uncomfortable regardless of how well it fits at the waist. If your waist is significantly smaller than your hips, look for styles with adjustable waistbands or graduated compression.