Sandro to lululemon clothing size

The short answer

Sandro 42 is lululemon L or XL by the two brands' own charts.

Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.

Every Sandro size read across to lululemon. FR sizes on the left, Letter on the right.
Sandro	Sandro builds it for	lululemon, by chart	Same label	lululemon builds it for	lululemon also prints
34	bust 32 in, waist 25 in, hip 35 in	XS	XS	bust 31 to 32 in	US 4
36	bust 34 in, waist 27 in, hip 36 in	S	S	bust 33 to 34 in	US 6
38	bust 35 in, waist 28 in, hip 38 in	M	M	bust 35 to 36 in	US 8
40	bust 37 in, waist 30 in, hip 39 in	L	L	bust 37 to 38.5 in	US 10
42	bust 39 in, waist 31 in, hip 41 in	L or XL	XL	bust 37 to 38.5 in	US 10

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, not a fit. We do not collect fit reports for this category yet, so this table is the two brands' own claims and nothing more.

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Sources

Sandro size guide, read on 2026-09-18.
lululemon size guide, read on 2026-09-18. lululemon on TrueToSize

lululemon to Sandro