How to Measure Yourself for a Swimsuit That Fits

By Mix n' Match Swimsuits & Swimwear | Kortni Jeane | Published: 2026-10-16

Category: How-to Guides

Learn how to measure your bust, waist, and hips at home, then turn those numbers into a swimsuit size that fits without guessing or returns.

Quick answer

Measure your bust, natural waist, and hips over bare skin or thin underwear, keeping the tape level and snug but not tight. Write down each number in inches, then compare all three against the size chart and the fit notes for the specific style you want. If two measurements land in different sizes, size to the larger one for tops and to your hip measurement for bottoms.

Measure your bust without guessing

Wrap the tape around the fullest part of your bust, usually across the nipple line. Keep the tape parallel to the floor all the way around your back, and let your arms rest at your sides once the tape is in place. Breathe normally and record the number to the nearest half inch. If you wear a bra while measuring, use one with no padding so the number reflects your actual shape.

Find your natural waist

Your natural waist is the narrowest point of your torso, usually just above the belly button and below the bottom of your rib cage. Bend sideways slightly; the crease that forms is your natural waist. Measure there, keeping the tape relaxed. Don't suck in or pull the tape tight, because a swimsuit has to sit comfortably when you're breathing, sitting, and swimming.

Measure your hips at the fullest point

Stand with your feet together and wrap the tape around the fullest part of your hips and seat, usually about 7 to 9 inches below your natural waist. Keep the tape level. This number matters most for bottoms, because a high-waisted style needs to clear your hip and seat comfortably without digging in. If you're between sizes here, round up rather than down.

Turn your numbers into a size

Compare each measurement to the size chart for the brand you're shopping. When your bust points to one size and your hips point to another, that's normal. Tops and bottoms are often sold separately for exactly this reason. Use your bust measurement for tops and your hip measurement for bottoms, then check whether the style runs true to size or has a fit note. If a style says it may fit slightly differently than other bottoms, treat that note as a real signal and read it before ordering.

Your 5-step measuring routine

Gather the right tools: Use a flexible fabric tape measure, not a metal carpenter's tape. Wear thin underwear or nothing at all, and stand in front of a mirror so you can see if the tape is level. Common mistake: measuring over bulky clothing or a padded bra, which adds inches that aren't you.
Measure your bust: Wrap the tape around the fullest part of your bust, keep it parallel to the floor, and let your arms rest at your sides. Record the number to the nearest half inch. Checkpoint: the tape should touch your skin all the way around without compressing it.
Measure your natural waist: Find the narrowest point of your torso by bending sideways. Measure there with the tape relaxed and breathe normally. Common mistake: pulling the tape tight and measuring your smallest possible waist instead of your real one.
Measure your hips at the fullest point: Stand with feet together and wrap the tape around the fullest part of your hips and seat, usually 7 to 9 inches below your natural waist. Keep the tape level. Checkpoint: if you're between sizes, round up for bottoms so the suit doesn't dig in when you sit or swim.
Compare against the size chart and fit notes: Match each measurement to the brand's chart, then read the fit note on the specific style. If your bust and hips suggest different sizes, buy the top and bottom in different sizes. Next step: when a style says it may fit differently, use the fit finder or contact the store before ordering.

How these measurements apply to real styles

High-Waisted Bottoms: High-Waisted Bottoms are listed as true to size, typically hit right above the belly button, and offer full bottom coverage. If your hip measurement puts you between sizes, the true-to-size note means you can usually order your measured size rather than sizing up for coverage.

Mini Ruffled Around Top: The Mini Ruffled Around Top is listed as true to size and has a dramatic ruffle around the top. A ruffle adds visual volume at the bust, so if your bust measurement is near the top of a size range, check the size chart carefully before choosing.
Mini Mid-Ruffle Bottoms: Mini Mid-Ruffle Bottoms are true to size but the style may fit slightly different than other bottom styles, with a dainty ruffle above the hips. When a style has its own fit note, your hip measurement is the starting point, not the final answer. Read the note and use the fit finder if you're unsure.