Bra Sister Sizes

Sister sizes are bras that share the same cup volume but differ in band and cup measurements. They are helpful if you’re between sizes, feel a bit of discomfort, or struggle to find your perfect fit. With sister sizing, you can adjust the band or cup size while keeping the cup volume consistent.

Sister size down Your size Sister size up
– 65C 70B
– 65D 70C
– 70A –
65C 70B 75A
65D 70C 75B
– 70D 75C
– 70E 75D
70B 75A –
70C 75B 80A
70D 75C 80B
70E 75D 80C
– 75E 80D
– 75F 80E
75B 80A –
75C 80B 85A
75D 80C 85B
75E 80D 85C
75F 80E 85D
– 80F 85E
80B 85A –
80C 85B 90A
80D 85C 90B
80E 85D 90C
80F 85E 90D
85C 90B –
85D 90C –
85E 90D –
– 90E –