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Size & Fit Guide
How to Get the Best Fit
Buying a swimsuit online doesn’t have to be a pain.
No guessing, no crossing your fingers. From size charts and measuring help to fit and style comparisons, this page is here to help you feel good about your choice before you click “add to cart.”
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Tips for the Perfect Fit
Designed with a Compressive Fit
our suits are designed to fit snug and feel like a second skin - compressive but not crazy tight. The elastics shouldn't dig. If they do, try a size up.
Long Torso Sizing
If you have a longer torso or bigger boobs/butt, may want to consider opting for our “Tall” version in our one-piece styles. This will give your swimsuit more length and more room where you need it!
Accurate Measurements
Measure yourself and find the closest match in the chart for the most accurate sizing. For a step-by-step guide, check out our demo video on how to measure yourself. In between sizes? Chat with a fit expert or book a fit consult to go through specifics!
Built to Relax when Wet
Remember that when you're in the water, your suit will relax a tiny bit — we designed with this in mind.
Bust Measurements
Bust measurement is your overall bust circumference, taken around the largest part of your chest (different from your bra band size).
View our Size Gallery
To browse images of women wearing Left on Friday IRL check out our gallery here.
How to Measure
A good fit starts with accurate info
A few quick measurements can make all the difference. Grab a soft measuring tape, stand comfortably as you are (no flexing, no sucking in), and let the tape rest naturally against your body. You’re looking for accuracy, not perfection.
Bust
Wrap the tape around the fullest part of your chest and keep it straight across your back. This should capture your entire bust, think overall circumference, not just the bra band size.
Torso
Starting at the top of one shoulder, run the tape down through your legs and back up to the same shoulder. Follow your natural shape and keep the tape close without pulling.
Waist
Measure where your waist naturally sits—usually around your belly button. The tape should feel comfortable, not tight, and you shouldn’t need to hold your breath.
Hips
Find the widest part of your hips and bum and measure all the way around. Keep the tape loose enough to stay relaxed, but snug enough to stay in place.
Two Piece
Style Guide
This guide breaks down every swimsuit style and cut in one place.
Filter by style, compare fits side by side, and get a clearer sense of coverage, support, and overall feel before you choose.
66 Styles
Compare Styles Side by Side
