Guides
Bra Fitting Guides
Four short guides covering how a bra should fit, how size systems differ, what a cup letter actually measures, and when a sister size helps. Start with fit if you are not sure where to begin, since most sizing questions turn out to be fit questions first.
Find my starting sizeHow Should a Bra Fit?
Check the band first, then the cups, then straps and wires. Most fit problems get misread when you start in the wrong place.
Bra Size Systems Explained
A size label is a band and a cup step. Different countries write those two parts differently, so the same fit can carry different labels.
Cup Sizes Explained
A cup letter is not a fixed volume. It describes a step away from the band it is attached to, which is why the letter alone tells you very little.
Sister Sizes Explained
A sister size moves the band and cup in opposite directions to keep volume close while the band changes. It helps most when the cup is already right.
Common fit problems
If you already know what is going wrong, start from the symptom instead.