Should you size up or down in sports bras?
For every band size you go up, you should go down one cup size. For example, if your measurement results in a size of 30C, your sister sizes are 32B and 34A. Many sports bras come in small, medium, large and extra large sizing.
What size sports bra is a 36C?
Don’t know your bra size? Use your measurements instead.

Underbust Measurement | 25″-26″ | 31″-32″ |
---|---|---|
Band Size | 30 | 36 |
C | 31.9″ – 32.7″ 30C XS XS (A-C) | 37.8″ – 38.6″ 36C L L (A-C) |
D | 32.7″ – 33.5″ 30D S S (D-DD) | 38.6″ – 39.4″ 36D L L (D-DD) |
DD | 33.5″ – 34.3″ 30DD S S (D-DD) | 39.4″ – 40.2″ 36DD L L (D-DD) |
What size bra am I if I wear a large sports bra?
Nike’s large sports bras are for women whose standard measurement falls on or in between 36D-36E and 38A-38C. This size is for women on the bigger side of the bust spectrum, whether in the breast area or in the boob’s underside.
Are sports bras meant to be tight?
Snug, but not too tight: A sports bra should fit tighter than a regular bra but shouldn’t restrict breathing; you should be able to fit two fingers between the straps and your shoulders. Wrinkles are bad: The fabric of the cup should be smooth. Wrinkles in the fabric are usually an indication that the cup is too big.
How do you know if your sports bra is too small?

Then check how your cups fit. If the cups fit perfectly around your breasts and there’s no overflow or gaping, your cup size is correct. Overflow at the top or sides suggests the cup size is too small. If your breasts have extra room inside the cups, your cup size is too large.
What happens if you wear a tight sports bra?
“Any tighter compressive garment that isn’t taken off can lead to some irritation such as a rash, and even a fungal infection,” Dr. Tutela says. “Any bra that’s too tight can lead to skin irritation, so I definitely recommend being sized correctly.”
Do sports bras loosen over time?
Try on the next size down. And remember if it initially feels too tight, they do stretch. To get longevity from your sports bra you’re best to go for the tighter fit (as long as it’s not uncomfortably tight) and let it loosen up over time.
How do you know if a sports bra is too big?
If there’s a gap between the band and your body, or you can easily fit more than two fingers under the band of your bra, it’s not doing its job. The cups should also fit completely flush against your skin, with no gaps; if you can pinch excess fabric over your bust you need a smaller cup size.