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Step 1
Take off your bra. Measure yourself without the bra to get the most accurate size.
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Step 2
Take a flexible measuring tape and wrap it under your breasts and around your torso along your rib cage. Write that measurement in inches on a piece of paper. If your measurement is an odd number, round up to an even number. If your measurement includes a fraction like 32 and 1/2 inches, round down to 32 inches. You can adjust the clasps on your bra for a proper fit.
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Step 3
Measure around your torso along the fullest point of your bust. Round up if your measurement is between two numbers. Write that measurement in inches on your paper.
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Step 4
Remeasure around your torso under your arms at the top of your breasts. Write that measurement in inches on your paper.
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Step 5
Add the two numbers from steps 2 and 4 and divide the total by 2. This determines the band size for your maternity bra.
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Step 6
Subtract your band size measurement from your measurement in step 3 to determine your cup size.
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Step 7
Look at the chart for your cup size 1"=A, 2"=B, 3"=C, 4"=D, 5"=E, 6"=F, 7"=G, 8"=H, 9"=I and 10"=J.












