Cup sizes? But if the letter is the cup size, what does the number mean?
Bella 34I
Sage 34G
Heather 34F
Tiffany 34E
Christie 34D
They are all 34, but they are not the same size.
Ok finally done my research here's how you can measure the cup size of a person.
First you need to get the band size. Band size the number that represents the circumference of your ribcage, where the bra band sits.
To determine the band size:
Measure snugly around your ribcage, directly under your breasts. Add 3 inches to this measurement. For example, if your ribcage is 31 inches, your band size is 34. If your result is an odd number, go UP to the next band size.. For example, if your rib cage is 32 inches, 32+3=35, round 35 up to a 36 band size.
After getting the band size you can calculate the cup size. Cup size represent the volume of tits which is indicate by letters.
To determine the cup 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.
Difference = Cup size
0″ = AA
1″ = A
2″ = B
3″ = C
4″ = D
5″ = DD/E
6" = DDD/F
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. Since 37-34= 3, you've got a C cup.
Here is the calculation and the description for numbers and letter