UGG Shoe Size Chart

UGG runs large — consider sizing down.

UGG Men's Size Chart

USEUUKJP / CM
436322
4.536.53.522.5
537423
5.537.54.523.5
638524
6.538.55.524.5
739.5625
7.5406.525.5
840.5726
8.5417.526.5
942827
9.542.58.527.5
1043928
10.543.59.528.5
11441029

UGG Women's Size Chart

USEUUKJP / CM
536322
5.536.53.522.5
637423
6.537.54.523.5
738524
7.538.55.524.5
839.5625
8.5406.525.5
940.5726
9.5417.526.5
1042827
10.542.58.527.5
1143928
11.543.59.528.5
12441029

Data verified Jun 2026 · Official size guide · See an error? Report it

Do UGGs run big, and should I size down?

Yes — UGG Classic boots run large and the sheepskin stretches with wear, so UGG recommends sizing down. If you're between sizes go a half size down; for whole-size-only Classic styles, drop to the nearest whole size. A US women's 8 is UK 6 and EU 39.5.

Fit
Runs large — size down
Classic styles
Whole sizes only
US W 8 =
UK 6 · EU 39.5
CM
25

UGG Sizing & Fit Guide

UGG Classic sheepskin boots run large and stretch with wear, so UGG recommends sizing down — a half size down if you're between sizes, or down to the nearest whole size for whole-size-only Classic styles. UGG uses unified US sizing where the women's number is one above the men's.

Frequently Asked Questions