Women's Swimsuit Size Calculator
Calculate starting sizes for one-piece suits and two-piece bikinis, with dedicated split-sizing recommendations for balanced support and coverage.
Anchored by bust & underbust volume.
Anchored by fullest hip circumference.
- Long Torso (Over 5′8″ or Long Body): If a one-piece pulls uncomfortably at your shoulders or rides up at the crotch, look specifically for "Long Torso" or "Tall" specialty cuts, or choose a high-waisted bikini.
- Petite Torso (Under 5′3″): If excess fabric bunches across your midriff, explore petite-proportioned swimwear.
- Wet Fabric Behavior: High-performance swimwear fabrics (spandex/elastane) expand slightly when wet. Your swimsuit should fit securely snug when dry.
How to Measure for Swimwear
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1
Measure your fullest bust
Measure horizontally around the fullest part of your bust to establish top cup coverage and shelf-bra tension.
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2
Measure your natural waist
Measure around the narrowest point of your midriff to determine torso contouring for one-piece suits and high-waisted bottoms.
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3
Measure your fullest hips
Stand with feet together and measure around the widest point of your hips and seat to prevent leg-band pinching.
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4
Note your torso length
If you are over 5′8″ or standard one-pieces pull uncomfortably at the shoulders, choose long-torso sizing or select two-piece separates.
Frequently Asked Questions
Swimwear is engineered with strong recovery fibers. For one-piece suits, always size to accommodate your largest circumference measurement (bust, waist, or hips). For two-piece suits, buying separate top and bottom sizes ensures optimum coverage and support.
A one-piece swimsuit should fit securely snug when dry without painfully pulling at your shoulders or riding up at the crotch. Swimwear fabrics contain high elastane and nylon content that expands slightly when submerged in water; a suit that feels loose in the dressing room will sag or bag when wet.
If your bust and hips align with different sizes, two-piece swimwear (bikinis or tankinis) is the ideal solution because you can purchase tops and bottoms in separate sizes. If you prefer a one-piece silhouette, size to fit your largest measurement and look for adjustable shoulder ties, ruching, or surplice necklines that accommodate body variance.
Long-torso swimsuits feature 1 to 2 inches of additional vertical torso length through the body without increasing the bust, waist, or hip width. They are tailored for women who experience shoulder strap digging, excessive neckline pulling, or crotch discomfort in standard one-piece suits.