Gap Size Charts

Choose your maternity size based on your pre-pregnancy size.

The maternity sizing allows room for a standard weight gain of 25-30 pounds.

Measuring Tips

Here are some tips to help you order the correct size. If you don't have a measuring tape, use a piece of string and hold it alongside a ruler.

How to Find Your Bra Size

There are two elements to your bra size: the band size (i.e. 32, 34, 36, 38, 40) and the cup size (i.e. A, B, C, D, DD). You will need a measuring tape to determine your bra size.

You should take your measurements while you are wearing a non-padded underwire bra or a tight-fitting seamless T.

Because standard band sizes are even numbers only, if you have an odd-numbered band size, you may need to go up or down a size depending on how you like your bra to fit.

Band Size

Wrap the measuring tape tightly around your rib cage (just below your bust), then add 5 inches to the measurement. For example: a ribcage measurement of 27” + 5”= 32” band size.

Double Check

You can double check your band size by measuring loosely around your back, even with your bra line, bringing the tape to the front just above your bra line.

Cup Size

Measure loosely around the fullest part of your bust, then subtract your band size from this measurement. A difference of 1”= A, 2”= B, 3”= C, 4”= D, 5”= DD. For example: a cup measurement of 34” - 32” band size = 2” or a B cup.

Now that you have your measurements, knowing how the bra should be positioned on your body will also help you find your perfect bra.

Find Your Right Fit

How your bra is positioned on your body is as important as taking accurate measurements. Here are a few key points to keep in mind when you're trying on bras to ensure that you get the right fit:

Bra Straps

Should not cut into your shoulder blades. Adjust them individually so they are comfortable and support breast tissue. If your straps are falling down, you may not be filling up the cups. Try a smaller cup size.

The Band

Should be fitted, but not cutting into your skin (you should be able to fit two fingers comfortably under the band). It should sit lower on the back than in the front. The back of the bra should not ride up above the bra line. If it does, adjust the straps. If the bra still rides up, try a smaller band size.

The Underwire

Should completely surround the breast tissue to provide support.

Gap Maternity Bras Alpha Size Chart

Measurement Unit: US (inch) | World (cm) | Both

Label	Size
S	A - B
M	B - C
L	C - D
XL	D - DD

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Gap Maternity Bras Band Size Chart

Measurement Unit: US (inch) | World (cm) | Both

Label	Size	Dress Size
XS	32	0 - 4
S	34	6 - 8
M	36	10 - 12
L	38	16 - 18

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To compare with another brand/style, please select the options below.

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Gap Maternity Bras and Nursing Size Chart

Measurement Unit: US (inch) | World (cm) | Both

Label	Band Size	Cup Size
S	32	A
S	32	B
S	32	C
S	32	D
S	32	DD
M	32	F
S	34	A
S	34	B
S	34	C
M	34	D
M	34	DD
M	34	F
M	36	A
M	36	B
M	36	C
M	36	D
L	36	DD
L	36	F
L	38	A
L	38	B
L	38	C
L	38	D
XL	38	DD
XL	38	F
XL	40	A
XL	40	B
XL	40	C
XL	40	D
XL	40	DD
XL	40	F

Compare Size Charts

To compare with another brand/style, please select the options below.

Brand:
Category:
Type:
Size Chart:
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Size Label:

Length Conversion

Note: 1 inch = 2.54 cm, 1 cm = 0.394 inch, 1 foot = 30.48 cm, 1 cm = 0.033 foot, 1 foot = 12 inch, 1 inch = 0.083 foot

Essential Tools

If you do a lot of online apparel shopping, accurate body measurement using a tape measure is a must. The actual tape you choose doesn’t matter that much. This measuring tape set has two double-sided, 60-inch / 150 cm, durable tape measure in pink and black. They are small and light pocket-size measuring tapes, and they have accurate, large and clear markings in both inches and centimeters, which are very easy and convenient to read. They are also great for body measurement, sewing, tailoring, weight loss tracking, or measuring any curved surface.

How to measure without a ruler or tape measure?

If you don't have a ruler or tape measure handy, you can try to measure with a standard credit card, which has a width of 3 ⅜ inch or 8.56 cm and a height of 2 ⅛ inch or 5.4 cm.