Sperry Shoe Size Chart

Sperry's own published size chart, covering a 25cm to 31.5cm foot, with 4 real width fittings rather than length alone, including a children's chart Sperry publishes itself. Every figure below is keyed to a measured foot length rather than converted from another size number. Open the calculator with Sperry selected to read it against all 35 brands at once.

Does Sperry run small?

No. By its own size chart, Sperry sizes in line with most brands in both men's and women's sizes. A 27 cm foot is a men's US 9 in Sperry and in 22 of 34 other brands' charts. Charts show how a brand means its sizes to fit, not how any one shoe feels, so read Sperry's own fit advice below as well.

Foot length	Sperry	Most common in other brands
Men's, 25.5 cm	US 7.5	US 7.5 (20 of 34)
Men's, 27 cm	US 9	US 9 (22 of 34)
Men's, 28.5 cm	US 10.5	US 10.5 (19 of 34)
Women's, 23 cm	US 6	US 6 (14 of 33)
Women's, 24 cm	US 7	US 7 (15 of 34)
Women's, 25 cm	US 8	US 8 (15 of 34)

How this is worked out: every foot length from 25 to 29 cm (men's) and 22.5 to 26 cm (women's), in 1 mm steps, is read against Sperry's chart and the other 34 brands' charts the way the calculator reads them, rounding up between sizes. The answer is the average gap between Sperry's size and the size the other brands give most often. See the methodology.

Sperry men's size chart

Foot length (cm)	US	UK	EU	JP
25	7	6	39	25
25.5	7.5	6.5	40	25.5
26	8	7	41	26
26.5	8.5	7.5	41.5	26.5
27	9	8	42	27
27.5	9.5	8.5	42.5	27.5
28	10	9	43	28
28.5	10.5	9.5	44	28.5
29	11	10	44.5	29
29.5	11.5	10.5	45	29.5
30	12	11	46	30
31	13	12	47.5	31
31.5	14	12.5	48	31.5

Sperry women's size chart

Foot length (cm)	US	UK	EU	JP
22	5	2.5	35	22
22.5	5.5	3	35.5	22.5
23	6	3.5	36	23
23.5	6.5	4	37	23.5
24	7	4.5	37.5	24
24.5	7.5	5	38	24.5
25	8	5.5	39	25
25.5	8.5	6	39.5	25.5
26	9	6.5	40	26
26.5	9.5	7	40.5	26.5
27	10	7.5	41	27
27.5	10.5	8	42	27.5
28	11	8.5	42.5	28
28.5	11.5	9	43	28.5
29	12	9.5	43.5	29

Sperry kids' size chart

Foot length (cm)	US	UK	EU	JP
8.2	0C	—	15	8.2
8.6	0.5C	—	15	8.6
9	1C	—	16	9
9.5	1.5C	—	16	9.5
9.9	2C	—	17	9.9
10.3	2.5C	—	18	10.3
10.7	3C	—	18	10.7
11.2	3.5C	—	19	11.2
11.6	4C	—	19	11.6
12	4.5C	—	20	12
12.4	5C	—	20	12.4
12.9	5.5C	—	21	12.9
13.3	6C	—	22	13.3
13.7	6.5C	—	22	13.7
14.2	7C	—	23	14.2
14.6	7.5C	—	23	14.6
15	8C	—	24	15
15.4	8.5C	—	25	15.4
15.8	9C	—	25	15.8
16.3	9.5C	—	26	16.3
16.7	10C	—	27	16.7
17.3	10.5C	—	27.5	17.3
17.7	11C	—	28	17.7
18.1	11.5C	—	28.5	18.1
18.5	12C	—	29	18.5
18.9	12.5C	—	30	18.9
19.3	13C	—	31	19.3
19.7	13.5C	—	31.5	19.7
20.1	1Y	—	32	20.1
20.6	1.5Y	—	33	20.6
21	2Y	—	34	21
21.4	2.5Y	—	34	21.4
21.8	3Y	—	35	21.8
22.2	3.5Y	—	36	22.2
22.7	4Y	—	36	22.7
23.1	4.5Y	—	37	23.1
23.5	5Y	—	37	23.5
23.9	5.5Y	—	38	23.9
24.3	6Y	—	38	24.3
24.7	6.5Y	—	39	24.7
25.2	7Y	—	39	25.2

Sperry width chart

Sperry publishes 4 men's and 4 women's width fittings. The standard fitting is M in men's and M in women's.

Men's fittings

Fitting	What Sperry calls it	Note
S	Narrow	About 3mm narrower across the forefoot than medium, per Sperry
M	Medium (standard)
W	Wide	About 3mm wider across the forefoot than medium, per Sperry
XW	Extra Wide	About 6mm wider across the forefoot than medium, per Sperry

Women's fittings

Fitting	What Sperry calls it	Note
S	Narrow	About 3mm narrower across the forefoot than medium, per Sperry
M	Medium (standard)
W	Wide	About 3mm wider across the forefoot than medium, per Sperry
XW	Extra Wide	About 6mm wider across the forefoot than medium, per Sperry

Not every model is made in every fitting. Enter a forefoot width in the calculator and it returns Sperry's own fitting for your foot. The width chart compares fittings across brands, and the wide-feet guide shows how to tell whether your foot is wide.

How to measure for Sperry

Trace your foot on paper with your weight evenly distributed, mark heel to longest toe, and measure. Sperry's own guidance is to measure both feet and use the larger, and if you fall between sizes to take the LARGER size for toe room.

Sperry fit guidance

Sperry boat shoes are traditionally worn without socks and the leather relaxes and moulds to the foot with wear, so a new pair should feel snug but not painful. Sperry sells widths as S (narrow), M (medium, the standard), W (wide) and XW (extra wide) rather than by US letter. Their own guide puts W at about 3mm wider across the forefoot than M, and XW about 6mm wider. Sperry notes the exact difference varies by style and last, and not every style is made in every width. Sperry's children's chart is keyed on Brannock measurements (a true foot measurement), running from an 8.2cm infant foot to 25.2cm. From 10.5 up the figures are sperry.com's own current chart; the infant and toddler sizes below that come from an earlier copy of the same Brannock chart. Their infant and youth bands reuse US numbers, so band suffixes are shown here. No UK column is published for the children's range.

Where this data comes from

Sizing information reviewed October 2026. Manufacturers revise their charts from time to time, so always confirm against the specific model before buying.

Find your size in every brand at once. Enter your foot length in the calculator and compare Sperry against 34 other brands side by side.

Open the shoe size calculator with Sperry selected