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A 34E means a 34-inch band with a E cup — roughly a 6-inch difference between your underbust and your bust measurement. Cup letters are not consistent between markets: UK-sized brands like Panache run a different ladder to US labels, so your 34E may sit a letter along depending on who made it.
How a 34E should fit
At E cup the band needs to be firm, not merely snug. A 34E should fasten on the loosest hook with about two fingers' resistance, leaving room to tighten as the elastic relaxes over six to nine months of wear.
Sister sizes to try if 34E isn't right
- Band feels loose but the cup is right — try 32F
- Band is comfortable but you're spilling over — go up to 34F
- Band digs in — 36DD gives the same cup volume with more room
Best 34E styles
Full-coverage and balconette shapes are the most reliable at 34E. If you want something under a t-shirt, choose a moulded cup with a seam beneath the bust rather than a completely smooth one. For sport, an encapsulation bra that supports each breast separately will beat a compression style at this size.