Kids grow fast, and every child is shaped a little differently, so an age label can only tell you so much. The good news is that choosing the right size doesn’t need a tape measure and a wriggling toddler. Here’s the simple way we recommend doing it.
1. Start with a swimsuit that already fits
The most reliable guide is a swimsuit your child wears now and loves. Lay it flat on a table, smooth it out without stretching it, and measure it in centimetres. It’s quicker and far more accurate than measuring a child who would rather be at the beach.
Then compare those measurements with our Size Guide. Every chart lists measurements of the garment laid flat, so you’re comparing like with like.
2. Know which measurements matter
A: length · B: hip · C: bust · D: waist
- One pieces: length matters most. Measure from the top of the shoulder strap down to the crotch. A one piece that’s too short will dig in at the shoulders, even if the width is right.
- Bikinis and two-piece sets: use the bust, waist and hip measurements.
- Boardshorts: measure straight across the top of the waistband, edge to edge. The elastic gives a few extra centimetres of stretch.
- Hats and caps: measure around the widest part of the head with a soft tape, just above the ears and across the forehead.
Boardshorts: measure straight across the waistband
3. Allow for stretch
Our swim fabric has four-way stretch and gives around 2–4 cm when worn, so a snug flat measurement is perfectly fine. Swimwear should sit close to the body; a loose suit tends to sag once it’s wet.
4. Between sizes? Size up
Styles can vary by a centimetre or two. If your child is between sizes, we recommend going up. You’ll get a little extra length and a longer season of wear, and the same goes for hats.
5. Use age as a starting point only
Our sizes run from 1 (12–18 months) to 16 (15–16 years), and each size includes an age guide. Use it to find your starting point, then check the measurements. A tall four-year-old may be happier in a size 5 one piece, while a petite child may suit the size below.
A few extra tips
- Buying ahead for a holiday? Measure close to the trip if you can. Children can change a size over a few months.
- Buying a gift? Ask a parent for the size of a swimsuit that fits now, or choose a size up to be safe.
- Water shoes have their own chart. See our Water Shoe Size Guide and measure the length of your child’s foot.
Still not sure?
We’re always happy to help. Get in touch with your child’s age and the measurements of a swimsuit that fits, and we’ll help you choose.
