Bra Sizing Guide


Understanding Bra Sizes


Did you know that choosing the right size bra for your unique curves and silhouette is a key factor in overall bra comfort?


As humans, we tend to be creatures of habit, and if habit dictates that you are, for instance, a 34B, then you may still be purchasing bras in the 34B size, regardless of how many years have gone by since you thought about bra fit and body measurements.


A properly fitting bra is based upon two key factors: overbust size and underbust size. Use this bra sizing guide to find the right size for your current measurements.


How to Measure Your Bra Size


Find your most comfortable, well-fitting bra and put it on. Grab flexible measuring tape and follow these easy steps for getting an accurate bra size.



woman wearing red sports bra using measuring tape



Step 1. Measure the band size or underbust. Wrap the tape around your rib cage, placing it directly under your bust. Round up to the nearest whole number. Jot down the number of inches. Add four inches to this number. If your results are an odd number, round that number up to the next whole number.


Step 2. Now, it’s time to measure the fullest part of your bust. This is called the cup size/overbust. Securely (not tightly) wrap the tape evenly across that part of your breast with the tape ends meeting at one nipple. Jot down the number of inches.


Step 3. Subtract the band size measurement (step 1) from the cup size measurement (step 2) to come up with the difference for those two measurements. Use the difference to find your cup size on the USA/CA cup/band chart below.

Example: 40 cup – 38 band = 2 inches


Cup/Band Bra Size Conversion Chart


AA Cup. The difference is 0 to 1-inch.

A Cup. The difference is 1-inch.

B Cup. The difference is 2 inches.

C Cup. The difference is 3 inches.

D Cup. The difference is 4 inches.

DD or E Cup. The difference is 5 inches.

DDD or F Cup. The difference is 6 inches.

G Cup. The difference is 7 inches.

H Cup. The difference is 8 inches.

I Cup. The difference is 9 inches.

J Cup. The difference is 10 inches.


Conversion Measurements for Small to 2XL Bra Sizes


Using band size measurements from earlier, you can determine how a bra is going to fit when cup sizes are not featured on the sizing chart. Instead, you are given a choice of small to 2XL which corresponds to specific band sizes. This type of sizing is often used for sports bra styles. The following chart reflects USA and UK bra sizes.


Small =  band/underbust is 32 inches

Medium = band/underbust is 34 inches

Large = band/underbust is 36 inches

XL = band/underbust is 38 inches

2XL = band/underbust is 40 inches


Standard Cup Sizes in Order

32A, 32B, 32C, 32D

34A, 34B, 34C, 34D

36A, 36B, 36C, 36D

38A, 38B, 38C, 38D

40A, 40B, 40C, 40D

42A, 42B, 42C, 42D


Standard Whole Sizes

34, 36, 38, 40, 42, 44, 46, 48, 50, 52


Please note that sizing charts may vary


Types of wireless comfort bras we offer include:

Cross and Shape

Front Hook

Snap Front

Zip Front

Find these and other styles by shopping our bra collection.








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