At Wonsie, we know that comfort starts with the right fit. That’s why our bodysuits are designed to suit a wide range of bodies, from children and teens through to adults and the elderly.

Because our customers come in many different shapes and proportions - particularly through the torso - our size chart is shown as measurements up to a maximum, rather than a single fixed measurement. This represents the largest body size that each Wonsie is designed to comfortably accommodate, allowing for flexibility in fit and freedom of movement.

How to Choose the Right Size

Our numbered sizes (e.g. 4–10) are based on general age ranges, however every body is different, so we recommend referring to the measurements on the size chart rather than age alone.

If you’re between sizes, taller in height, or wearing nappies, we generally suggest sizing up for added comfort and ease of fastening.

For the best fit, please review the size chart below and pay particular attention to the torso length.

Adult & Teen Sizes

Sizes 12/XS through to 22/XXL are size ranges suitable for teens and adults.

Please note: The large sizes are designed to fit extra-tall or broader-bodied adults.

Swimwear

Our swimwear features excellent 4-way stretch.
If you're between sizes, we suggest choosing the smaller size for a snug fit when wet.

Swim Nappies, Bibs & Accessories

Sizing varies by product. Please refer to each product listing for detailed sizing information.

Need a Size Exchange?

No worries! Please refer to our exchange policy or contact us at sales@wonsie.com.au - we’re always happy to assist.