Lucky Brand to Uniqlo jeans size

The short answer

Lucky Brand 0 is Uniqlo 25 or 26 by the two brands' own charts.

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

Every Lucky Brand size read across to Uniqlo. US numeric sizes on the left, Waist size on the right.
Lucky Brand	Lucky Brand builds it for	Uniqlo, by chart	Same label	Uniqlo builds it for	Uniqlo also prints
0	waist 25.5 in, hip 36 in	25 or 26	not published	waist 25 in	not published
2	waist 26.5 in, hip 37 in	26 or 27	26	waist 26 in	not published
4	waist 27.5 in, hip 38 in	27 or 28	27	waist 27 in	not published
6	waist 28.5 in, hip 39 in	28 or 29	28	waist 28 in	not published
8	waist 29.5 in, hip 40 in	29 or 30	29	waist 29 in	not published
10	waist 30.5 in, hip 41 in	30	30	waist 30 in	not published

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.
Uniqlo size guide, read on 2026-09-18. Uniqlo on TrueToSize

Uniqlo to Lucky Brand