Underwire pokes your armpit but the cups fit: width or height?
Armpit poking is often a wire-geometry problem, not a simple size problem.
Too tall
If the wire follows the breast root but continues upward into the armpit, compare shorter side wires and lower side wings.
Too wide
If the wire extends well behind breast tissue and then pokes, compare a narrower wire with more cup depth.
Too narrow can also hurt
A wire sitting on breast tissue can feel like side pain. Check where the tissue actually ends before deciding the wire is too wide.
Cup depth can move the wire
A shallow cup can push tissue outward and distort wire position. More depth may improve comfort without adding overall volume.
What to do next
Use Bra Fit Rescue with the bra you have already tried. The tool combines band, cup, wire, center, strap, wear, and asymmetry signals rather than treating one symptom in isolation.
Bra Cups Too Tall? Spot a Cup-Height Mismatch
If cups gap near the straps, rub the armpits, or feel like too much bra, cup height may be the problem rather than cup volume.
Read guide →Fit guideUnderwire Slides Down Below the Breast? Check Cup Depth and Band Stability
If an underwire will not stay in the breast crease, the cup may be too shallow, the band may be unstable, or the wire geometry may not match.
Read guide →Fit guideBra Fit for a Short Torso: What Construction Usually Works Better
If bras feel too tall, poke under the arms, or take up too much vertical space, compare cup, wire, wing, and gore height—not just size.
Read guide →