Brooks to Panache bra size

The short answer

Brooks L is Panache 36C by the two brands' own charts.

Cups are counted along each brand's own letter order, and the band is carried across unchanged.

Every Brooks size read across to Panache. Letter sizes on the left, US on the right.
Brooks	Brooks builds it for	Panache, by chart	Same label	Panache builds it for	Panache also prints
XS	not published	30B	not published	not published	UK B
S	not published	32C	not published	not published	UK C
M	not published	34C	not published	not published	UK C
L	not published	36C	not published	not published	UK C
XL	not published	38C	not published	not published	UK C
XXL	not published	40C	not published	not published	UK C

Tinted rows change label or sit between two sizes. Read from the two charts only; no formula and no averaging.

What wearers say

Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.

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Sources

Brooks size guide, read on 2026-09-18. Brooks on TrueToSize
Panache size guide, read on 2026-09-17. Panache on TrueToSize

Panache to Brooks