Size 34B Swimwear
This 34B swimwear collection is currently empty. Use the fit guidance below to compare cup and band labels separately from the measurements needed for a complete swimsuit. For help with measurements and size systems, use our Swimwear Size Chart.
Comparing 34B Cup and Band Labels
US and UK charts share the 34B label. Begin with the size system on a bra that fits comfortably, then translate the label using the swimwear manufacturer's chart. A matching letter alone does not establish the same cup volume, and a combined fit label is specific to the brand that prints it.
Allowing for More Than a 34B Bust Fit
A bikini or tankini top and its matching bottom can require separate sizes. A one-piece also needs sufficient torso length and room at the waist and hips. Compare those measurements with the actual garment before assuming your bra label determines the whole suit; there is no universal change of band or cup size for swimwear.
Frequently Asked Questions About 34B Swimwear
Is 34B swimwear available in this collection now?
This collection is currently empty. These notes provide fit guidance and do not indicate that a product is available or that a restock has been scheduled.
How does 34B swimwear compare across size systems?
US and UK charts share the 34B label. Use the particular manufacturer's chart before choosing a label; the same conversion does not guarantee the same neckline, band tension or garment fit.
Should I change my 34B bra size automatically for swimwear?
No. Start with the manufacturer's chart and the size system on a bra that fits you, then assess the actual garment. Cup shape, fastening options and torso fit differ between models. If something feels wrong, identify where it pulls, gaps or moves before changing the band or cup.
What should I notice if a 34B swim cup gaps and presses at the same time?
Notice whether the gap sits at the neckline while pressure remains at the base or sides. That combination can come from a cup shape that does not suit you. Settle into the cups and ease overly tight straps before comparing another shape; choosing a smaller cup solely to remove the gap may add pressure.
Does a 34B label establish the fit of a one-piece or bottom?
No. Compare waist and hip measurements for a separate bottom and include torso length for a one-piece. A bra-size label describes only part of a complete swimsuit's fit. A comfortable cup does not establish that the leg openings, body length or waist will fit comfortably.
For everyday styles, browse our 34B bras.