Gymnastics Leotard Sizing Guide: How to Find the Perfect Fit

A leotard that doesn’t fit right isn’t just uncomfortable — it can hold a gymnast back. One that’s too tight restricts range of motion during a split leap or a bar routine; one that’s too loose can shift, ride up, or become a distraction during a competition. Getting the size right the first time saves you the hassle of exchanges and makes sure your gymnast can focus on their routine, not their outfit.   This guide walks through exactly how to measure a gymnast for a leotard, which measurement matters most (it’s not the one most people guess), and the most common sizing mistakes parents and athletes make.

 

Why Age and Height Alone Don’t Work for Leotard Sizing

It’s tempting to size a leotard the way you’d size a t-shirt by age or height. But gymnasts’ bodies vary widely in proportion even at the same age or height: two 8-year-olds who are the same height can have very different torso lengths, chest measurements, or hip width. Because leotards are form-fitting and stretch to the body, a size based purely on age or height often ends up too short in the torso or too tight through the hips, even if the overall size “looks right” on a chart.

That’s why every reputable gymnastics apparel guide, from major competitive brands to boutique leotard makers, relies on body measurements, not age brackets, to determine the correct size.

The Measurements You’ll Need

You’ll need a soft, flexible measuring tape (a tailor’s or sewing tape measure works best; it conforms to the body far better than a rigid tape) and about five minutes with your gymnast standing in their regular practice leotard or fitted undergarments, not baggy clothes.

1. Torso (Girth): The Most Important Measurement

This is the one most parents skip or measure incorrectly, and it’s the measurement that matters most for how a leotard actually fits.   How to measure it: Starting at the top of one shoulder, run the tape straight down the front of the body, through the legs (like a diaper line), and back up the spine to the same shoulder where you started.  

2. Chest

Wrap the tape around the fullest part of the chest, keeping it horizontal and snug but not tight, with arms relaxed at the sides.

3. Waist

Measure around the natural waistline, the narrowest part of the torso, roughly where the body bends side to side. This is usually just above the belly button, not at the hip bone.

4. Hips

With feet together, measure around the fullest part of the hips and seat, keeping the tape level all the way around.

5. Inseam (Optional, but Useful for Fit Around the Legs)

Measure from the top of the inner thigh down to just above the floor, with shoes off. This isn’t always required for standard leotard sizing, but it helps confirm how the leg openings will sit — useful if your gymnast has previously experienced chafing or leg openings that ride too high or too low.

Common Sizing Mistakes to Avoid

Measuring over bulky clothing. This adds inches that don’t reflect the actual fit. Measure over a leotard or fitted underlayer.     Using a rigid tape measure. A stiff tape won’t curve naturally around the body and tends to produce inaccurate numbers, especially for torso and hip measurements.     Sizing by age instead of measurements. As covered above, two same-age gymnasts can need very different sizes.     Ignoring torso length in favor of chest/waist. A leotard can look right on paper by chest and waist alone and still fit poorly if the torso length is off.     Rounding down when between sizes. When a measurement falls between two sizes, the more comfortable and longer-lasting choice — especially for a growing gymnast — is almost always to size up.

How to Use Your Measurements

Once you have chest, waist, hip, and torso measurements, compare each one against Modevant’s size chart rather than picking a single number. If your gymnast’s measurements land in different size columns (for example, a chest that matches a Small but a torso that matches a Medium), size up to the larger of the two; it’s easier for a leotard to be taken in through minor styling (like adjustable straps) than to compensate for one that’s genuinely too short or tight.

If your gymnast is between sizes or you’re unsure after measuring, our team is glad to help you double-check fit. Accurate sizing up front means fewer exchanges and a leotard that’s ready to perform from day one.

FAQ

What’s the most important measurement for a leotard?

Torso length (also called girth) matters most, since leotards are designed to fit snugly from shoulder to hip. Chest, waist, and hip measurements refine the fit, but torso length determines whether the leotard will feel right during movement.

Should I size up or down if my gymnast is between sizes?

Size up. A slightly roomier leotard is far more comfortable and practical for a growing athlete than one that restricts movement or rides up during routines.

Can I size a leotard using height and age alone?

It’s not recommended. Gymnasts of the same age and height can have very different torso lengths and proportions, so body measurements give a much more reliable fit than age-based charts.

How often should I re-measure my gymnast?

For growing children and teens, re-measuring every 4-6 months (or any time a leotard starts to feel tight in the torso or across the shoulders) helps catch sizing changes before they affect training or competition.

Do gymnastics leotards run true to size?

Fit can vary by brand and style, since leotards are performance garments cut close to the body. Always check measurements against the specific brand’s size chart rather than assuming your usual size will carry over.

Conclusion

The right leotard fit comes down to accurate torso, chest, waist, and hip measurements, not age or guesswork. Take five minutes with a soft measuring tape, compare the numbers to Modevant’s size chart, and size up when in doubt. A properly fitted leotard means one less thing for your gymnast to think about, so they can focus on sticking the landing.

Ready to find your gymnast’s perfect fit?

MODEVANT TEAM