Under Armour Shoe Size Chart

Under Armour's own published size chart, covering a 22cm to 34.5cm foot, including a children's chart Under Armour publishes itself. Every figure below is keyed to a measured foot length rather than converted from another size number. Open the calculator with Under Armour selected to read it against all 35 brands at once.

Does Under Armour run small?

No. By its own size chart, Under Armour 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 Under Armour 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 Under Armour's own fit advice below as well.

Foot length	Under Armour	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 Under Armour'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 Under Armour's size and the size the other brands give most often. See the methodology.

Under Armour men's size chart

Foot length (cm)	US	UK	EU	JP
22	4	3	37	22
22.5	4.5	3.5	37.5	22.5
23	5	4	38	23
23.5	5.5	4.5	38.5	23.5
24	6	5	39	24
24.5	6.5	5.5	39.5	24.5
25	7	6	40	25
25.5	7.5	6.5	40.5	25.5
26	8	7	41	26
26.5	8.5	7.5	42	26.5
27	9	8	42.5	27
27.5	9.5	8.5	43	27.5
28	10	9	44	28
28.5	10.5	9.5	44.5	28.5
29	11	10	45	29
29.5	11.5	10.5	45.5	29.5
30	12	11	46	30
30.5	12.5	11.5	46.5	30.5
31	13	12	47	31
31.5	13.5	12.5	47.5	31.5
32	14	13	48	32
32.5	14.5	13.5	48.5	32.5
33	15	14	49	33
33.5	15.5	14.5	49.5	33.5
34	16	15	50	34
34.5	16.5	15.5	50.5	34.5

Under Armour women's size chart

Foot length (cm)	US	UK	EU	JP
22	5	2.5	35.5	22
22.5	5.5	3	36	22.5
23	6	3.5	36.5	23
23.5	6.5	4	37.5	23.5
24	7	4.5	38	24
24.5	7.5	5	38.5	24.5
25	8	5.5	39	25
25.5	8.5	6	40	25.5
26	9	6.5	40.5	26
26.5	9.5	7	41	26.5
27	10	7.5	42	27
27.5	10.5	8	42.5	27.5
28	11	8.5	43	28
28.5	11.5	9	44	28.5
29	12	9.5	44.5	29

Under Armour kids' size chart

Foot length (cm)	US	UK	EU	JP
8	2K	1.5	17.5	8
9	3K	2.5	18.5	9
10	4K	3.5	19.5	10
11	5K	4.5	21	11
12	6K	5.5	22	12
13	7K	6.5	23.5	13
14	8K	7.5	25	14
15	9K	8.5	26	15
16	10K	9.5	27	16
16.5	10.5K	10	27.5	16.5
17	11K	10.5	28	17
17.5	11.5K	11	29	17.5
18	12K	11.5	29.5	18
18.5	12.5K	12	30	18.5
19	13K	12.5	31	19
19.5	13.5K	13	31.5	19.5
20	1Y	13.5	32	20
20.5	1.5Y	1	33	20.5
21	2Y	1.5	33.5	21
21.5	2.5Y	2	34	21.5
22	3Y	2.5	35	22
22.5	3.5Y	3	35.5	22.5
23	4Y	3.5	36	23
23.5	4.5Y	4	36.5	23.5
24	5Y	4.5	37.5	24
24.5	5.5Y	5	38	24.5
25	6Y	5.5	38.5	25
25.5	6.5Y	6	39	25.5
26	7Y	6	40	26

How to measure for Under Armour

Measure heel-to-toe standing, using the longer foot.

Under Armour fit guidance

Under Armour athletic footwear generally runs true to size. If you are between sizes, sizing up is the more common recommendation for running and training models. Under Armour's children's range is unusually complete, running from an 8cm infant foot to 26cm. Their largest youth size, 7Y, fits the same 26cm foot as a men's 7. Sizes carry a K suffix up to 13.5K before restarting at 1Y. Under Armour's own note is worth heeding: because of metric-to-imperial rounding, two US sizes sometimes share one UK size, so match on foot length rather than converting between size numbers.

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 Under Armour against 34 other brands side by side.

Open the shoe size calculator with Under Armour selected