mybrafit. Find your perfect fit
Blog · 2026-03-12

🔍 10 Bra Fitting Myths — Debunked

From "always add 4 inches" to "underwires cause cancer", here are 10 fit myths and the truth.

Myth: Add 4 inches to your under-bust

False. Modern bras stretch — fit your true measurement.

Myth: A D cup is always big

False. A 32D cup volume equals a 30DD or 34C — small frame, full breasts.

Myth: Underwires cause cancer

False. No study supports this. Poor fit causes discomfort, not disease.

Myth: Sleeping in a bra prevents sagging

False. Sagging is from Cooper's ligaments, not gravity at night.

Myth: All bras stretch out the same

False. Quality bras hold shape 18+ months. Cheap bras die in 3.

Myth: I can wear my pre-pregnancy bra after the baby

False. Bra size changes 2–3 cup sizes during pregnancy and breastfeeding.

More from the blog