Size 38N Bikinis
Also labeled UK 38JJ and EU 85N
Bikini tops in 38N should hold a very deep cup on the band alone, with straps that only steady the fit. If the top rides up, the band is the first thing to check. Use the Cup-Sized Bikini Size Chart to match US, UK and EU labels.
When a 38N Bikini Band Rides Up
Look for a band deep enough to sit flat on a 38 frame, since a narrow band can roll or fold when you bend. Sit and lean forward in the top, since a band that feels secure standing can lift at the back when you bend. You should be able to slide two fingers under the band at the back, but not much more.
After a swim, check the band on dry land. If a larger band has crept up your back, set it a step firmer next time.
Cup Depth in 38N Bikini Tops
An N cup is a very deep cup, so it needs coverage that reaches back toward the underarm and down to the band. With this much depth, small changes in cup shape can matter more than the letter, so compare how each cup holds you. If the cups gap and press at the same time, try a different cup shape before changing size.
In UK sizing, look for 38JJ. UK sizing doubles the letter here, so a US N reads JJ.
Choosing a Back Closure for 38N
A hook band works like a bra band, while ties let you choose the exact length each time. With a larger band, check that whichever you choose sits level and does not loosen when you swim. If ties keep slipping, double knot them or look for a hook back.
Want a matching everyday bra? Try our 38N bras.
Frequently Asked Questions About Size 38N Bikinis
How does 38N convert to UK and EU bikini sizes?
US 38N is labeled UK 38JJ and EU 85N, because UK sizing doubles the J for this cup. Check which system each brand uses.
What should I do if my 38N bikini cups gap at the top?
Lean forward and settle your bust into each cup, then check again. If the gap stays, the cup shape may not suit you, or the cup may be a little deep, so try another shape before changing size.
What does it mean if a 38N bikini cup edge cuts in?
It usually means the cup is too shallow for your depth. With a very deep cup, look for more depth or coverage rather than a tighter band.
How can I tell if a 38N bikini band is too tight?
It leaves deep red marks, makes a full breath feel hard, or pushes skin over the edge. Loosen it one setting or retie it slightly longer, then check that it still sits level on a larger band.
How can I tell if a 38N bikini band is too loose?
It rides up at the back, shifts when you raise your arms, or only feels secure with the straps pulled tight. Tighten or retie it so it stays level on a larger band, then check it again after a swim.
What should I check first in a 38N bikini top?
Check the band first. It should sit level and firm on a larger band, because the cups and straps can only work once the band is anchored.