One-piece swimsuits have reclaimed their place at the top of swimwear fashion, and for good reason. They're versatile, flattering and — thanks to modern design — just as stylish as any bikini. Whether you're after a sleek competition-style one-piece, a bold cutout design or a modest full-coverage option, this guide will help you find the right fit.
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What to Look for in a One-Piece Swimsuit
Torso Length
The most important fit factor in a one-piece is torso length. If the suit is too short, straps will pull down and the crotch will ride up. Too long and the chest area won't support properly. Most brands offer standard and long-torso options — if you're taller than 170cm, always check if a long-torso version is available.
Bust Support
For larger cup sizes, look for underwire, wider straps and a shaped cup. Brands like Sea Level, Sunseeker and Baku are excellent for D+ cups, offering underwire construction in one-pieces. Seafolly and Tigerlily tend to suit A–C cups better.
Coverage Preferences
One-pieces range from barely-there (scooped backs, side cutouts) to full-coverage sporty styles. For active swimming and Darwin's outdoor lifestyle, look for racerback or cross-back styles that stay secure during movement.
Best One-Piece Swimsuit Brands at Splash Swimwear
- Sea Level — Australian-made, excellent for DD+ cups, mastectomy options available
- Sunseeker — Full-figure range with great coverage and print selection
- Baku — Trendy designs with good bust support up to DD cup
- Seafolly — Fashion-forward, great for smaller busts, iconic Australian prints
- Tigerlily — Bohemian aesthetic, tie-detail styles, suits slender to athletic frames
- Funkita — Performance one-pieces for lap swimming and active water sports
One-Piece Swimsuit Styles Explained
- Halter neck — Adjustable support, suits most bust sizes
- Racerback — Sporty, stays in place during activity
- Bandeau — Strapless, great for tanning, best for A–C cups
- Plunge — Low V-neckline, very on-trend, best with good bust support
- High neck — Excellent sun coverage, suits all bust sizes
- Cutout — Fashion-forward, comes in conservative and daring options
Care Tips for One-Piece Swimsuits
Always rinse your one-piece in cold fresh water after swimming — salt, chlorine and sunscreen all degrade elastane fibres. Hand wash with gentle detergent and lay flat to dry in the shade. Never wring or tumble dry. See our full Swimwear Care Guide for more tips.
Shop One-Piece Swimsuits at Splash Swimwear
Browse our full range of one-piece swimsuits online or visit us in-store at Casuarina Square, Darwin. Our team can help with fitting advice for any body type.