G cup bras: at least three rows of hooks

With a gap of 25 centimetres between the bust and back, you move into a bra cup G, which is equivalent to a F in British or American sizing. This is the depth at which the back band becomes the most important part of the bra.

The back band carries the load in cup G

It supports the majority of the weight. At this depth, a narrow band with two hooks rolls back, rises towards the shoulder blades, and transfers all the weight to the straps. What to look for: a height of at least four centimetres, three rows of hooks that allow tightening as the elastic stretches, and side bones that prevent the band from twisting under the arm. A well-fitted bra cup G rests on its back, not on its shoulders.

Checking the fit of a cup G

Three checks are enough. The band should remain perfectly horizontal, from the sternum to the shoulder blades: if it rides up at the back, it is too loose. The central seam between the cups should lie flat against the sternum: if it lifts away, the cup is too small. Finally, the underwire should fully encircle the breast without resting on it, which can be checked by raising the arm. If the cup G gapes despite a well-fitted back, try the cup F in a larger back size before concluding there is a shape issue.