- Bust: measure around the fullest part while wearing light support.
- Underbust: measure around the ribcage where a bralette band sits.
- Waist: measure the natural waist without pulling the tape tight.
- High hip: measure where a bikini-cut waistband is likely to sit.
- Full hip: measure around the fullest part of the hips and seat.
Size guide
Request sizing, confirmed before payment.
Natural Bikinis sources cotton-rich underwear and bralette pieces with bikini-inspired styling. Size labels vary by supplier, so every paid order must be approved against the exact supplier chart first.
No payment before approval
Use this guide to make a request. We confirm the exact size chart, fabric stretch, opacity risk, stock, and shipping path before checkout or fulfillment.
Supplier chart checked
Fit notes reviewed
Exchange risk explained
How to measure
Use body measurements, not your usual letter size.
Cotton-rich underwear can relax when damp and tighter elastic can mark the body. A real measurement gives us a better approval path than guessing from S, M, L, or XL.
Fit starting point
Approximate request guide
These ranges are a starting point only. The supplier chart for the exact item overrides this table before payment.
| Request size | Bust | Underbust | Waist | Full hip | Fit note |
|---|---|---|---|---|---|
| S | 32-34 in | 27-29 in | 25-27 in | 35-37 in | Best for a close fit with light stretch. |
| M | 34-36 in | 29-31 in | 27-29 in | 37-39 in | Usually the safest first request for average stretch. |
| L | 36-39 in | 31-34 in | 29-32 in | 39-42 in | Better when between sizes or avoiding tight elastic. |
| XL | 39-42 in | 34-37 in | 32-35 in | 42-45 in | Requires supplier confirmation because XL varies widely. |
Approval notes
Tell us how you want it to fit.
A cotton-rich set can look clean when dry but behave differently after water exposure. Fit notes help us avoid approving the wrong supplier item.
Bottom fit
Rise and elastic
Share whether you prefer low, mid, or higher rise. If you dislike tight waist or leg elastic, size up may be safer.
Top fit
Band support
Bralettes vary more by band than cup. Underbust measurement matters because a loose band can shift when wet.
Water caution
Cotton changes
Cotton can absorb water, sag, cling, or turn sheer. We do not make a swimwear claim for unverified pieces.