UGG Size Chart and Fit Guide by Style

UGG says its shoes generally fit true to size, but the right choice depends on the style, your instep and the socks you wear. There is no single size-up or size-down rule for half sizes. Start with UGG's chart, then check the model-specific guidance below.

For example, UGG describes Classics as roomier casual boots that can feel snug in the lining at first. Its original Tasman page gives a choice between a snug and relaxed fit, but UGG's Tasman II pages do not repeat that advice.

Shop this guide: Women's Tasman II · Men's Tasman II · Classic Mini II · Kids' Tasman II

Start with the style you want

For more fit advice, read UGG's sizing article. For the differences between the original Tasman and Tasman II, see our UGG slipper guide.

Measure first, then use UGG's chart

UGG recommends measuring while standing, in the afternoon, and measuring both feet. On paper, mark the heel and longest toe, measure the distance and use the larger heel-to-toe measurement. Use UGG's size charts below, then check the sizes offered for the style you want.

Women's UGG size chart

Women's sizes from UGG

US Women's	Heel to Toe (IN)	UK	EU	Japan (CM)	Mexico (CM)	China (MM)
5	8.7	3	36	22	22	220
5.5	8.9	3.5	36.5	22.5	22.5	225
6	9.1	4	37	23	23	230
6.5	9.3	4.5	37.5	23.5	23.5	235
7	9.5	5	38	24	24	240
7.5	9.7	5.5	38.5	24.5	24.5	245
8	9.8	6	39	25	25	250
8.5	10.0	6.5	39.5	25.5	25.5	255
9	10.2	7	40	26	26	260
9.5	10.4	7.5	40.5	26.5	26.5	265
10	10.6	8	41	27	27	270
10.5	10.8	8.5	41.5	27.5	27.5	275
11	11.0	9	42	28	28	280
11.5	11.2	9.5	42.5	28.5	28.5	285
12	11.4	10	43	29	29	290
13	11.8	11	44	30	30	300
14	12.2	12	45	31	31	310
15	12.6	13	48	32	32	320

Men's UGG size chart

Men's sizes from UGG

US Men's	Heel to Toe (IN)	UK	EU	Japan (CM)	Mexico (CM)	China (MM)
3	8.3	2	36	21	21	210
4	8.7	3	37	22	22	220
4.5	8.9	3.5	37.5	22.5	22.5	225
5	9.1	4	38	23	23	230
5.5	9.3	4.5	38.5	23.5	23.5	235
6	9.4	5	39	24	24	240
6.5	9.6	5.5	39.5	24.5	24.5	245
7	9.8	6	40	25	25	250
7.5	10.0	6.5	40.5	25.5	25.5	255
8	10.2	7	41	26	26	260
8.5	10.4	7.5	41.5	26.5	26.5	265
9	10.6	8	42	27	27	270
9.5	10.8	8.5	42.5	27.5	27.5	275
10	11.0	9	43	28	28	280
10.5	11.2	9.5	43.5	28.5	28.5	285
11	11.4	10	44	29	29	290
11.5	11.6	10.5	44.5	29.5	29.5	295
12	11.8	11	45	30	30	300
13	12.2	12	46	31	31	310
14	12.6	13	48.5	32	32	320
15	13.0	14	49.5	33	33	330
16	13.4	15	50.5	34	34	340
17	13.8	16	51	35	35	350
18	14.2	17	52	36	36	360

Kids' UGG size chart

Kids' sizes from UGG

US Children's	Heel to Toe (IN)	Heel to Toe (MM)	UK	EU	Japan (CM)	Mexico (CM)	China (MM)
8T	5.9	150.5	7	25	15	15	150
9T	6.3	158.9	8	26	16	16	160
10T	6.6	167.4	9	27.5	17	17	170
11T	6.9	175.8	10	28.5	17.5	17.5	175
12T	7.3	184.3	11	30	18.5	18.5	185
13K	7.6	192.8	12	31	19.5	19.5	195
1K	7.9	201.2	13	32.5	20	20	200
2K	8.3	209.7	1	33.5	21	21	210
3K	8.6	218.1	2	35	22	22	220
4K	8.9	226.6	3	36	22.5	22.5	225
5K	9.3	235.1	4	37	23.5	23.5	235
6K	9.6	243.5	5	38	24.5	24.5	245

Toddler UGG size chart

Toddler sizes from UGG

US Children's	Heel to Toe (IN)	Heel to Toe (MM)	UK	EU	Japan (CM)	Mexico (CM)	China (MM)
3T	4.3	108.2	2.5	18.5	11	11	110
4T	4.6	116.6	3.5	19.5	11.5	11.5	115
5T	4.9	125.1	4.5	21	12.5	12.5	125
6T	5.3	133.5	5	22	13.5	13.5	135
7T	5.6	142	6	23.5	14.5	14.5	145
8T	5.9	150.5	7	25	15	15	150
9T	6.3	158.9	8	26	16	16	160
10T	6.6	167.4	9	27.5	17	17	170
11T	6.9	175.8	10	28.5	17.5	17.5	175
12T	7.3	184.3	11	30	18.5	18.5	185

See UGG Sizing Information. K and T are UGG's own children's size labels. On our Kids' Tasman II listing, toddler sizes keep the T and UGG's 13K to 6K sizes appear as plain numbers. Choose the size system shown for your product; do not assume that the same number means the same fit in adult and children's footwear.

Between sizes: consider socks and fit preference

UGG's sizing article advises trying both sizes when your measurement falls between them. It says thicker socks can call for more room in some Classic and Tasman styles, while some slippers and clogs may suit a smaller size on narrow feet or low insteps. Those are conditional suggestions, not a rule for the entire brand.

For the original Tasman, UGG's product page says people between sizes can choose down for a snug fit or up for a relaxed fit. Do not automatically apply that instruction to Tasman II. Half sizes are offered in select UGG styles; check the exact product page.

What changes as the lining settles?

UGG says shearling-lined suede styles can feel snug at first, then soften as the lining compresses. Leather- or textile-lined styles retain their structure more consistently. UGG says the lining typically softens after a few wears but gives no set break-in time, so choose the length from the chart rather than counting on stretch.

Pairs to compare

Also compare Men's Tasman II, Classic Ultra Mini, Scuffette II and Men's Neumel.

Frequently asked questions

Do UGGs run small or big?

UGG says its shoes generally fit true to size, with some styles designed for a roomier fit. Check the specific style and its chart rather than choosing one size rule for all UGG shoes.

Should I size up or down if I wear a half size?

UGG gives no single direction for all styles. Measure both feet and use the longer heel-to-toe measurement with UGG's chart. For styles offered in whole sizes, UGG suggests starting with the whole size you usually lean toward; if your measurement falls between sizes, try both with the socks you plan to wear.

Does the original Tasman sizing advice apply to Tasman II?

No single Tasman fit rule covers both versions. UGG gives snug-fit and relaxed-fit choices on the original Tasman page. Its Tasman II pages do not repeat that advice, so size Tasman II from UGG's chart. UGG's sizing article adds that some Tasman styles may need more room with thicker socks.

Will snug UGG lining soften?

Yes, UGG says shearling lining can soften and compress with wear. Choose your size from the chart rather than counting on the lining to stretch.

Can I use an adult UGG size for a child?

No. Use the children's chart and the size system shown for the product. UGG publishes separate adult and children's tables; the same number is not a universal size across them.

Need help with fit?

For help with a particular pair, call (310) 398-7497 or email info@feetheart.com. You can also visit Feet World in Culver City or Arcadia to try shoes in person. Ask about the style and size before visiting.

Full-price items have a 30-day return window after delivery with free return shipping. Final-sale items cannot be returned. See the return policy.