Bust measurement 43 inches rib cage measurement 36 inches difference of 7 inches so d cup. I cant find the average ribcage size for women. That actual rib cage measurement no magic number involved is used for the band length. Then take your rib cage measurement directly under your bra. Bra sizes that are the same in volume are often referred to as sister sizes. The combination of bcd and rib cage is your pattern size.
That measurement in inches will determine your cup and frame size. I wear a 28g and this fits perfectly but my actual rib cage measurement is 24inches but should i actually find a very rare 26 band bra although it does up fine it does tend to poke into my ribs and ache at the end of the day so 28 is better. Your underbust measurement is odd so you add 1 leading to a band size of 36. While wearing a bra place the tape measure around your rib cage just below the bust under the bottom bra edge. Exhale deeplyyou want the smallest measurement possible. So 28 inches 30 inches 32 inches and so on.
Add 5 inches to that measurement to determine your bra size. Its dealing with bra sizes and rib cage size. I think this is right you just have to try them on until one fits. If you look at bra size charts that take the measurement directly it always tells you to take the measurement wearing a bra that fits. Lets say your underbust measurement is 35 and your overbust measurement is 42. Your bra size is a us 36ddddg.
Im 30 in when i measure under my breasts and im 5ft 7in. It uses your rounded underbust measurement as your band measurement. While braless or wearing a non padded bra take a measuring tape and measure snugly around your torso directly under your bust at your rib cage. Put on your best fitting non padded bra. The same volume of breast tissue spread across different size rib cages band sizes. Round to the nearest whole number and refer to the size chart below.
Make sure the tape is comfortably snug and take your measurement to the fullest inch. For example the bcd might be 40 and the rib cage of 32. Ensure a good sports bra fit now that youve figured out your estimated band and cup size its time to try on several different brands and styles of sports bras to test the fit. Make sure the measuring tape is straight and level. Your band size should essentially be your underbust measurement more on that in the next section rounded to the nearest inch. Straighten the tape so that its parallel to the floor.
Bra band sizes go in 2 inch increments. You can check the bra sizes chart or calculator further up this page to confirm your correct. Wrap a measuring tape snugly around your rib cage just beneath your bustline. The grey cells in the table below demonstrate how the sizes diagonally adjacent from the top right to the bottom left are the same in breast volume ie. Thats a 7 difference or a ddddg cup.