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38D Bras

(109 products)

How a 38D should fit

The band does around 80% of the work. Fastened on the loosest hook, a 38D band should sit level around your ribcage and stay put when you raise your arms — if it rides up your back, the band is too big regardless of how the cup feels.

Sister sizes to try

  • Band loose, cup fine — try 36DD
  • Cup overflowing — try 38DD
  • Band digs in — try 40C
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A 38D means a 38-inch band with a D cup — roughly a 4-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 38D may sit a letter along depending on who made it.

How a 38D should fit

The band does around 80% of the work. Fastened on the loosest hook, a 38D band should sit level around your ribcage and stay put when you raise your arms — if it rides up your back, the band is too big regardless of how the cup feels.

Sister sizes to try if 38D isn't right

  • Band feels loose but the cup is right — try 36DD
  • Band is comfortable but you're spilling over — go up to 38DD
  • Band digs in — 40C gives the same cup volume with more room

Best 38D styles

Moulded t-shirt bras give the smoothest line under fitted clothing at 38D. Balconette shapes suit a fuller bottom half of the breast, plunge styles work under lower necklines, and stretch-lace cups will forgive more day-to-day variation than a moulded cup will.

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