Brooks to Bras N Things bra size

The short answer

Brooks L is Bras N Things 14C 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 Bras N Things. Letter sizes on the left, AU on the right.
Brooks	Brooks builds it for	Bras N Things, by chart	Same label	Bras N Things builds it for	Bras N Things also prints
XS	not published	8B	not published	not published	UK B · US B · EU B · FR B
S	not published	10C	not published	not published	UK C · US C · EU C · FR C
M	not published	12C	not published	not published	UK C · US C · EU C · FR C
L	not published	14C	not published	not published	UK C · US C · EU C · FR C
XL	not published	16C	not published	not published	UK C · US C · EU C · FR C
XXL	not published	18C	not published	not published	UK C · US C · EU C · FR 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
Bras N Things size guide, read on 2026-09-18.

Bras N Things to Brooks