You ordered your usual size. It didn't fit. You ordered up. Too loose. You ordered down. Couldn't breathe. You've spent more money on returns than on shapewear that actually works. This is the shapewear sizing trap and millions of women fall into it every single day.
Here's why it happens and how to get it right the first time.
Every Brand Sizes Differently
Unlike regular clothing where a size 8 is roughly a size 8 everywhere, shapewear sizing is completely inconsistent across brands. One brand's medium is another brand's large. Some brands size based on your dress size. Others size based on your waist measurement. Others use a completely different chart entirely. There is no universal standard and brands are not in a hurry to fix that because the confusion keeps you buying.
The biggest mistake women make is assuming their regular clothing size translates directly to shapewear. It almost never does.
Compression Level Changes the Fit
Shapewear comes in different levels of compression — light, medium, and firm. A medium compression piece in your usual size will fit completely differently than a firm compression piece in the same size. Firm compression runs tighter by design. If you're buying high-compression shapewear and sizing the same way you would for a light pair of leggings, you're going to end up miserable.
How to Size Correctly
Always measure before you buy. Use a soft tape measure and get your exact waist, hip, and thigh measurements. Then match those measurements to the brand's size chart — not your clothing size, your actual measurements.
If you're between sizes, go up. Shapewear that is slightly loose will still provide compression and smooth your silhouette. Shapewear that is too small will dig in, roll down, and create the overflow bulge you were trying to avoid in the first place.
Also check reviews specifically for fit comments. If multiple women say a piece runs small, size up before you order.
The Motion 33 Fit
Motion 33 shapewear and bodysuits are designed to fit true to size with compression that works without suffocating. Clean sizing, real compression, and a fit that actually holds — so you spend less time returning and more time feeling confident.
Shop the full collection at motion33.com and follow us on Instagram at @motion33official and TikTok at @motion33usa.