How do I calculate my bra size?

Measure loosely around the fullest part of your bust. Subtract the band size from this measurement. Use this number to determine your cup size according to the table below. Example: if your ribcage measurement is 31, and your bust measurement is 37, your bra size is a 34C: 31+3=34, so 34 is your band size.

How can I measure my bra size at home?

While braless or wearing a non-padded bra, use a measuring tape to measure around your torso directly under your bust, where a bra band would sit. The tape should be level and very snug. Round to the nearest whole number. If the number is even, add four inches.

Why do you add 4 inches to your band size?

Bra band size

When bra sizes were first conceived in the 1930s, the materials used for bras were a lot stiffer and less flexible – women were only just out of corsets – so manufacturers used to recommend adding 4 inches to your actual size to get the correct band size.

What size is a DD bra?

Bra Sizes
DD Sizes Under Band Cup Size
32DD 27″-28½” 36″
34DD 29″-30½” 38″
36DD 31″-33½” 40″
38DD 34″-36½” 42″