What is the bra size order?

Bra band sizes start from 28 and go up in increments of 2 inches (ie in even numbers) to around 56.

Cup sizes, which are in proportion to the band size, start at AA and go up to K in UK sizing. There are variations in cup sizing between different countries - some include double letters in between each cup size, others just follow the letters of the alphabet logically.

The number is the "band size" or "back size," and refers to the size of your frame excluding your breasts. The correct band size will usually be your underbust/ribcage measurement rounded to the nearest even number, for example if your underbust measures 33 inches you will most likely need a 34.

The cup size is represented by a letter, and this is relative to the band size so if you currently fill a 36C but you need a 34 band, then a 34C will be too small. You will need to try a 34D - go up one cup size for every band size that you go down.