Size 38K Bikinis
Also labeled UK 38H and EU 85K
38K bikini tops pair a larger band with a deep cup, and with no torso fabric to help, the band does nearly all of the holding. Start with your bra size, then check the band after a swim. Our Cup-Sized Bikini Size Chart shows the matching UK and EU labels.
Checking the Band on 38K Bikini Tops
Ties can be adjusted to any length, but on a 38 band they can work loose under the weight of the cups. Most bands that ride up after a swim were a little loose to begin with. Give the top a gentle tug at the back; a good band springs back to the same place.
Feel along the bottom of the band. On a larger band it should lie flat against your ribs without rolling or digging in.
Side Coverage for a 38K Bikini Top
K cups need depth and width, so check that the side of the cup sits behind your breast tissue rather than on it. Settle each side into the cup before judging, since a deep cup can look loose until your bust sits fully in it. Both cups should sit level with each other when the band is straight.
Its UK label is 38H. A UK H is a US K, while a UK K is a much larger US O.
Pairing Bottoms With a 38K Bikini Top
Bikini tops and bottoms are sized separately, so choose the top for your 38K bust and the bottoms for your waist and hips. Your bottom size will not follow your cup or band. Check the bottom's own size guide before you choose.
Need a bra in the same size? See our 38K bras.
Frequently Asked Questions About Size 38K Bikinis
How does 38K convert to UK and EU bikini sizes?
In UK sizing 38K becomes 38H and in EU sizing 85K; a UK K would be a US O. Check which system each brand uses.
What are the signs a 38K bikini band is too loose?
The cups tip forward, the back climbs toward your shoulder blades, or you can pull the band well away from your ribs. With a deep cup, those signs show quickly, so firm up the band before you touch the straps.
What is the first fit check for a 38K bikini top?
Start with the band, then the cups, then the straps. A level band lets you judge whether the cups hold a deep cup without spilling or gapping.
Where does the support in a 38K bikini top come from?
Mostly from the band and the cups working together. On a larger band, the straps should only fine tune the fit, not lift the weight.
Can I tighten the straps to make a 38K top feel secure?
No, not as a fix. Tight straps on a deep cup dig into your shoulders and pull the band up, so firm up the band first.
Will a 38K bikini top feel different once wet?
Yes, a little. Many swim fabrics relax once wet, so the band on a 38K top may feel slightly looser after a swim but should still stay level.