Brooks to CUUP bra size

The short answer

Brooks L is CUUP 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 CUUP. Letter sizes on the left, US on the right.
Brooks	CUUP, by chart	Same label	CUUP also prints
XS	30B	not published	not published
S	32C	not published	not published
M	34C	not published	not published
L	36C	not published	not published
XL	38C	not published	not published
XXL	40C	not published	not published

Neither chart publishes the body each size is built for, so the rows line up the labels. 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
CUUP size guide, read on 2026-09-17. CUUP on TrueToSize

CUUP to Brooks