Sandro to Diane von Furstenberg clothing size

The short answer

Sandro 42 is Diane von Furstenberg 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 Diane von Furstenberg. FR sizes on the left, Letter on the right.
Sandro	Sandro builds it for	Diane von Furstenberg, by chart	Same label	Diane von Furstenberg builds it for	Diane von Furstenberg also prints
34	bust 32 in, waist 25 in, hip 35 in	XS	XS	bust 32 in, waist 25 in, hip 35 in	US 0
36	bust 34 in, waist 27 in, hip 36 in	S	S	bust 33 to 34 in, waist 26 to 27 in, hip 36 to 37 in	US 2/4
38	bust 35 in, waist 28 in, hip 38 in	M	M	bust 35 to 36 in, waist 28 to 29 in, hip 38 to 39 in	US 6/8
40	bust 37 in, waist 30 in, hip 39 in	L	L	bust 37 to 38.5 in, waist 30 to 31.5 in, hip 40 to 41.5 in	US 10/12
42	bust 39 in, waist 31 in, hip 41 in	L or XL	XL	bust 37 to 38.5 in, waist 30 to 31.5 in, hip 40 to 41.5 in	US 10/12

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.
Diane von Furstenberg size guide, read on 2026-09-18.

Diane von Furstenberg to Sandro