Luna Rounded Bikini Top

Designed to move with ease. Our pieces are crafted with stretch and support to adapt to the body in motion — from studio to water and beyond.

If you are between sizes or unsure, we recommend choosing the size that aligns closest with your body measurements below.

How to Measure

Use a soft measuring tape and measure directly on the body.

Bust
Measure around the fullest part of your bust, keeping the tape level across your back and under your arms.

Waist
Measure around the narrowest part of your natural waistline. Keep the tape relaxed and parallel to the floor.

Hips
Measure around the widest part of your hips, ensuring the tape stays straight across the back.

Choosing Your Size

If your measurements fall between sizes, we recommend selecting the size closest to your hip measurement, as most BAYTHE pieces are designed to stretch comfortably across the body.

For a more relaxed feel, you may prefer to size up.

Product Fit Notes

Each product page includes model sizing and product-specific fit notes to help guide your choice.

Fabric composition and compression levels may vary between collections — particularly between swimwear and studio pieces — so we recommend reviewing the Fit & Fabric section on each product page.

Need help?

Email info@baytheswim.com and our team will gladly assist you in choosing the right size.