True & Co to Shock Absorber bra size

The short answer

True & Co XL is Shock Absorber 40C by the two brands' own charts.

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

Every True & Co size read across to Shock Absorber. Brand's own sizes on the left, UK on the right.
True & Co	True & Co builds it for	Shock Absorber, by chart	Same label	Shock Absorber builds it for	Shock Absorber also prints
XS	not published	32C	not published	not published	US C · EU C · FR C · AU C
S	not published	34C	not published	not published	US C · EU C · FR C · AU C
M	not published	36C	not published	not published	US C · EU C · FR C · AU C
L	not published	38C	not published	not published	US C · EU C · FR C · AU C
XL	not published	40C	not published	not published	US C · EU C · FR C · AU C
1X	not published	42C	not published	not published	US C · EU C · FR C · AU C
2X	not published	44C	not published	not published	US C · EU C · FR C · AU C
3X	not published	46C	not published	not published	US C · EU C · FR C · AU 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.

Open in the converter Add an item you own

Sources

True & Co size guide, read on 2026-09-18. True & Co on TrueToSize
Shock Absorber size guide, read on 2026-09-18. Shock Absorber on TrueToSize

Shock Absorber to True & Co