Before you rip the tags off a new cossie, give it a one‑minute fit test. This quick swimsuit fit checklist will show you if your swimmers are snug, supportive and ready for the beach – or if you need a different size or style.

Use these 10 checks any time you try on swimwear at Splash or at home. Your swimmers should feel like a comfortable, supportive second skin – never like they’re about to fall off or cut you in half.

Before You Start: How to Try On Swimwear

For the most accurate read on fit:

• Try swimsuits on over clean, dry underwear in good lighting.
• Do up all clasps, zips and ties the way you would at the beach.
• Expect a new suit to feel snug but not painful – swim fabrics relax slightly in the water and with wear.

10 Fit Checks in 60 Seconds

1. Strap comfort (5 seconds)
   Check your shoulder straps in the mirror. They should lie flat without digging in or slipping off. If they are cutting grooves into your skin, you may need a bigger cup, firmer band or a style with wider straps.
2. Band & underbust support (5 seconds)
   For one‑pieces and bra‑style tops, look side‑on: the band should sit level all the way around your body, not riding up at the back. You should be able to slide two fingers under it, but not pull it far away from the body.
3. Cup containment (5 seconds)
   Lean forward slightly and gently scoop your bust into the cups. There should be no major overspill at the top or sides and no gaping or wrinkling; both mean you need to adjust cup size or try a different shape.
4. Neckline security (5 seconds)
   Raise your arms above your head and rotate your shoulders. The neckline should stay in place without flashing or dragging uncomfortably low – especially in plunge and bandeau styles.
5. Tummy & torso comfort (5 seconds)
   For one‑pieces, sit down and take a deep breath. If the suit feels like it’s cutting into your shoulders or pulling hard through the crotch, it may be too short in the body; lots of excess wrinkling can mean it’s too long or too big.
6. Bottom & leg line (10 seconds)
   Turn around and check the back and sides. The leg openings should hug without severe digging or double‑bum; the fabric shouldn’t sag or form loose “bubbles”. Walk a few steps – if the bottoms constantly creep into a wedgie, you may need more coverage or a different cut.
7. Side view smoothness (5 seconds)
   Side‑on, the suit should lie relatively smooth over your curves. A little gentle compression is fine, but deep bulges where elastic cuts in or obvious bagginess are signs to size up or down.
8. Movement test (10 seconds)
   Do three moves: a squat, a small jump and a twist. Nothing should pop out, shift dramatically or need constant readjusting; you want to be able to chase kids, dive into waves or climb out of a pool without worrying.
9. Strap & tie security (5 seconds)
   Tug gently on any ties, halter straps or back fastenings. Make sure you can tie or clip them firmly yourself and that they hold when you give them a little pull – if not, tighten or choose a more secure fastening.
10. Comfort gut‑check (10 seconds)
    Close your eyes, take a breath and notice how the swimsuit feels. If you are already thinking about where it digs in, rides up or feels too loose, you will notice it even more at the beach – that’s your sign to keep trying.

When to Size Up, Size Down or Change Style

After running through the checklist:

• Size up if you see deep dig‑in marks, can’t comfortably sit or breathe, or have obvious bust or hip spillage.
• Size down if bands or straps fall off, fabric floats away from the body or you can pull the suit several centimetres from your skin.
• Change style if the size is technically right but you still feel exposed or unsupported – for example, swap tiny triangles for underwire, or low‑rise briefs for high‑waisted bottoms.

Need Help With Fit?

If you are still unsure after your 60‑second try‑on, bring your shortlist into Splash Swimwear in Darwin or get in touch online. Share your usual bra and clothing size plus where your swimsuit feels tight or loose, and our fit team can guide you to styles and sizes that feel secure, supportive and genuinely comfortable.