Lucky Brand to Ksubi jeans size

The short answer

Lucky Brand 0 is Ksubi 3 by the two brands' own charts. 5 of 6 Lucky Brand sizes land on a different label at Ksubi.

Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.

On 3 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.

Every Lucky Brand size read across to Ksubi. US numeric sizes on the left, US numeric on the right.
Lucky Brand	Lucky Brand builds it for	Ksubi, by chart	Same label	Ksubi builds it for	Ksubi also prints
0	waist 25.5 in, hip 36 in	3	0	waist 25.5 in, hip 36 in	Waist size 25 · Letter XS
2	waist 26.5 in, hip 37 in	4	2	waist 26.5 in, hip 37 in	Waist size 26 · Letter S
4	waist 27.5 in, hip 38 in	5	4	waist 27.5 in, hip 38 in	Waist size 27 · Letter S
6	waist 28.5 in, hip 39 in	6	6	waist 28.5 in, hip 39 in	Waist size 28 · Letter M
8	waist 29.5 in, hip 40 in	7	8	waist 29.5 in, hip 40 in	Waist size 29 · Letter M
10	waist 30.5 in, hip 41 in	8	10	waist 30.5 in, hip 41 in	Waist size 30 · Letter L

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

Lucky Brand size guide, read on 2026-09-18.
Ksubi size guide, read on 2026-09-18.

Ksubi to Lucky Brand