Size 34L Swimwear
Also labeled UK 34HH and EU 75L
34L swimwear should feel secure in the water and comfortable on land. With a very full cup, that means real cup depth and a band that does not ride up. Use our Swimwear Size Chart to check how each brand labels it.
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Keeping the 34L Band Level in Water
A band that slides up toward your shoulder blades on a 34 frame has usually loosened in the water. In a one-piece, the band area works with the body fabric, so a suit can feel tight at the ribs and loose at the waist at once. Slide two fingers under the band at the back; it should feel snug, not tight.
With a very full cup, check the straps last. If they leave a mark after a few minutes of standing, ease them off and look at the band again.
How 34L Swim Cups Should Hold You
An L cup projects well forward, so a shallow cup will flatten or spill even when the letter is right. If the center of the top lifts away from your chest, the cups may be too small for your depth. The cup edge should lie flat at the top and sides, with no ridge and no gap.
UK tags call it 34HH. HH is simply the UK letter for a US L cup.
When a 34L Suit Shifts in the Water
A suit that fits standing still can shift once you are active. Walk, reach overhead and bend forward in your 34L suit, then look at the cup edges and the back. If anything slips, fix the band first and the straps second.
For everyday styles, browse our 34L bras.
Frequently Asked Questions About Size 34L Swimwear
Which UK label matches US 34L swimwear?
Look for UK 34HH or EU 75L; the doubled HH is simply how UK sizing writes a US L. Read the size system on every tag.
Can a swimsuit give 34L the same support as a bra?
Yes, a suit sized by band and cup can come close, as long as the band is firm and the cups have enough depth for a very full cup. A suit sized only by dress size usually cannot hold 34L the same way.
Does a 34L bust need more side coverage in swimwear?
Yes, usually. With a very full cup, tissue can slip out near the underarm when you move, so look for cups that reach back toward your side.
Should 34L swimwear fit more snugly than my bra?
Yes, a little, especially in the band. Many swim fabrics give once wet, so a mid-range band that feels firm when dry usually sits right in the water. It should still let you breathe deeply without pinching.
Can I wear my usual 34L bra size in swimwear?
Yes, your 34L bra size is the right place to start for swimwear sized by band and cup. Swim cuts vary, so with a very full cup check the band and cup edges in each suit rather than trusting the label alone.
Why does my 34L swimsuit band ride up in the water?
Most often, the band has loosened once wet and is no longer anchoring a very full cup. Refasten it more firmly and check the fit again after a few minutes in the water. Tighter straps tend to make it worse.