Bra size chart

If your current bra is almost a perfect fit but you're still having minor issues (for example, the band is slightly too tight or the cups are just a bit loose), you can use this bra size chart to find your sister size.

Bra size chart organized by band size (columns) and cup volume (rows). To find your sister sizes, locate your current size and look across the row. All sizes in the same row have the same cup volume but different band sizes. Moving down increases cup volume. Moving right increases band size.

30	32	34	36	38	40	42	44
30AA
30A	32AA
30B	32A	34AA
30C	32B	34A	36AA
30D	32C	34B	36A	38AA
30DD	32D	34C	36B	38A	40AA
30DDD/E	32DD	34D	36C	38B	40A	42AA
30F	32DDD/E	34DD	36D	38C	40B	42A	44AA
30G	32F	34DDD/E	36DD	38D	40C	42B	44A
30H	32G	34F	36DDD/E	38DD	40D	42C	44B
30I	32H	34G	36F	38DDD/E	40DD	42D	44C
30J	32I	34H	36G	38F	40DDD/E	42DD	44D
	32J	34I	36H	38G	40F	42DDD/E	44DD
		34J	36I	38H	40G	42F	44DDD/E
			36J	38I	40H	42G	44F
				38J	40I	42H	44G
					40J	42I	44H
						42J	44I
							44J

First, locate your current bra size on the chart. Then, identify your fit issue.

If your band is too tight but your cups fit well, you'll want to move one box to the right on the bra size chart. For example, if you started at a 32D, you would move to a 34C. This new size will give you a bigger band without increasing the cup capacity.

If your band is too loose but your cups fit well, you'll move in the opposite direction. So, if you were originally a 32D, you'd move left on the bra size chart to land at 30DD. This new size will result in a tighter fitting band, but the volume of the bra cup will stay the same.

How to use the bra size chart

If the band fits well but the cup isn't quite right, that's when you'll move vertically on the chart. Move up the chart for a smaller cup size, and move down the chart for a bigger cup size. Vertical movement on the bra size chart keeps the band the same size but modifies the volume of the cups.

To change both the band and cup size, you'll move diagonally on the chart. Move diagonally down and to the right on the chart for a bigger band and cup. Move diagonally up and to the left for a smaller band and cup. For example, if I'm a 32D but want a bigger band and cup, I would land at a 34D. If I wanted a smaller band and cup, I would move up to a 30D.

Bra size chart for cup size

Cup size, which is represented by the letter within a cup and band bra size, is calculated by taking the difference between your bust measurement and band measurement. To find your cup size, first measure your bust at the fullest part of your chest, then measure your underbust, right where your bra band would sit.

Next, subtract your underbust measurement from your bust measurement. For example, my bust measurement was 32, and my underbust measurement was 28, my resulting number would be 4. Locate your number on the chart below to determine your bra cup size.

Cup size chart. Shows the cup size corresponding to the difference between your bust and underbust measurements in inches.

The Difference in inches	Your Cup Size Is
0	AA
1	A
2	B
3	C
4	D
5	DD
6	DDD / F
7	G

Bra size chart for cup and band to alpha size conversions

Some bras, especially wireless bras that have flexible cups, come in alpha sizing (XS, S, M, L, XL, 1X, 2X, 3X). If you only know your cup and band size, it can be difficult to know which alpha size is the best fit for you. First, use our bra size calculator to determine your cup and band size. Then, use your cup and band size to locate your alpha size on the chart.

Alpha size conversion chart. Shows the alpha size (XS, S, M, L, XL, 1X, 2X, 3X) for each cup and band size combination.

Cup	30	32	34	36	38	40	42	44
A	XS	XS	S	M	L			2X
B	XS	S	S	M	L		1X	2X
C	XS	S	M	L	L	1X	2X	3X
D	XS	S	M		XL	1X	2X	3X
E		S			XL

Bra fitting problems and solutions