Find Your Dome Size

There are 6 dome sizes. Each one is either Narrow or Wide, and assigned based on the underbust circumference of the user being below or above 73 cm:

Narrow (N)

Underbust < 73 cm

Wide (W)

Underbust > 73 cm

You can measure your underbust by measuring around your rib cage below your breasts. If you don't have a flexible measuring tape, you can use a ribbon and a ruler.

Additionally, each dome is either S, M, or L and assigned based on cup size. Victoria's Secret has a good calculator to find cup size (click here): 


S = AA Cup

M = A Cup

L = B Cup


S = A Cup

M = B Cup

L = C Cup