Size Guide

Every Rumi piece is cut from a high-stretch 82% nylon / 18% spandex blend, so our sizes are forgiving. Use the notes below to find your fit, and remember that exchanges are always free.

Sizes we make
Every top and bottom comes in XS, S, M and L.

Our model for reference
Height 5'8" (175 cm)
Bust 34C
Waist 66 cm
She wears a size M in every piece on the site.

Buy your top and bottom in different sizes
Our tops and bottoms are sold separately for a reason. If you are a size S on top and an M on the bottom, order exactly that. There is no penalty for mixing sizes, and it is the single best thing you can do to get a fit you will actually wear.

If you are between sizes, size up
The fabric has plenty of stretch, but a slightly roomier fit sits smoother, stops the straps digging in and keeps the silhouette clean. Sizing down tends to create pulling across the cups.

Fit notes by style

• Kami Bikini Top. Structured underwire balconette. It gives real lift and holds its shape, so go by your usual bra band size rather than your dress size.
• Elara Bikini Top. Softer, more minimal cut with less structure. Runs slightly more relaxed than the Kami.
• Bottoms. Cut to sit on the natural waist with moderate coverage at the back.

Still not sure?
DM @rumiswimwear on Instagram or use our Contact page with your usual bra size and your height, and we will tell you exactly which size to order. We would much rather help you get it right first time than process a return.

Looking after it
Rinse in cold water after every wear, hand wash with a mild detergent and dry flat in the shade. Avoid the tumble dryer and rough surfaces like pool edges, which pill the fabric.