How to Measure Bra Size at Home (Teen-Friendly Method)

Two measurements, one tape, two minutes. Here is the simplest way to find a size that actually fits — no changing room required.

Most people wear the wrong bra size, and teens change size faster than anyone. The good news: it takes two minutes and one measuring tape.

What you need

• A soft measuring tape (a phone app plus a piece of string also works)
• A soft, non-padded bra or a fitted vest
• A mirror, and two minutes of privacy

Step-by-step

1. 1Stand straight, arms relaxed at your sides.
2. 2Band: wrap the tape snugly around your ribcage, directly under the bust. Keep it level and firm. Note the number in inches. If it is an odd number, round to the nearest even number.
3. 3Bust: wrap the tape loosely around the fullest part of the bust, keeping it parallel to the floor. Note this number.
4. 4Subtract the band measurement from the bust measurement.
5. 5Use the difference to find your cup size in the chart below.
6. 6Combine: band number + cup letter. Example — 30 inch band, 32 inch bust, difference 2 inches = 30B.

Cup size chart

Indian sizing quick reference

The four-point fit check

1. 1Band: level all the way around, snug enough that two fingers fit underneath, not riding up at the back.
2. 2Cups: smooth, with no gaping and no spilling over the top or sides.
3. 3Straps: they should carry only about 10% of the support. If they dig in, the band is too loose.
4. 4Comfort: raise your arms, twist, jump. Nothing should shift or pinch.

Common mistakes

The bottom line

Band snug, cup smooth, straps light. Re-measure every six months while you are still growing, and never keep wearing a bra that leaves marks.