Size 34N Bikinis
Also labeled UK 34JJ and EU 75N
Holding a very deep cup on a mid-range band takes a bikini top sized like a bra, which is what 34N gives you. Check the fit dry and again after a swim, since wet fabric can relax. Compare brands and labels in our Cup-Sized Bikini Size Chart.
Checking the Band on 34N Bikini Tops
With a 34 band, the bikini band should feel firm and level, since it is the main thing anchoring the cups. Tie bands let you set the exact length, while hook bands give the same setting every time you wear them. Turn sideways to a mirror and make sure the band sits as low at the back as at the front.
Give the 34N top a test at home: wear it while you sit, reach and bend. If the band stays put and the straps stay comfortable, the fit is right.
Side Coverage for a 34N Bikini Top
An N cup is a very deep cup, so it needs coverage that reaches back toward the underarm and down to the band. A deep cup that fits well should let the center of the top rest close to your chest. Look for a smooth line where the cup meets your skin at the top and under your arms.
Its UK label is 34JJ. UK sizing doubles the letter here, so a US N reads JJ.
Pairing Bottoms With a 34N Bikini Top
Bikini tops and bottoms are sized separately, so choose the top for your 34N 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.
Shopping for everyday wear too? Browse our 34N bras.
Frequently Asked Questions About Size 34N Bikinis
How does 34N convert to UK and EU bikini sizes?
Look for UK 34JJ or EU 75N; the JJ sits between a UK J and a UK K. Check which system each brand uses.
Is a hook band better than a tie back for 34N?
No, not for everyone. A hook band keeps the same setting every time, while ties let you choose the exact length. With a very deep cup, pick whichever you can keep firm and level once wet.
Why does a halter top pull on my neck in 34N?
A halter puts the weight of the cups on the ties around your neck. With a very deep cup, that load adds up, so firm the band and consider straps that go over the shoulders.
Do 34N bikini tops and bottoms need to match in size?
No. Choose the top by your 34N bust fit and the bottoms by your waist and hip measurements. Many people wear different sizes on top and bottom.
What should I do if my 34N 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 34N 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.