KEEN size chart

KEEN’s own size charts cover men’s 7–17, women’s 5–12, unisex 3.5–17, toddler 4–7, little kid 8–13, big kid 1–7.

KEEN runs small in men’s shoes, against 23 other brands’ charts: size for size, its chart is made for a longer foot than another brand’s under 1% of the time, about the same (within 2.5 mm) 27% and a shorter one 73%, typically by half a size. Go about half a size up from the size you wear in most brands, or size from your foot length on its chart.

KEEN’s charts at a glance

Chart	Sizes	Foot lengths
Men’s	7–17	24.4–32.6 cm
Women’s	5–12	21.6–27.6 cm
Unisex	3.5–17	—
Toddler	4–7	11.4–14.0 cm
Little kid	8–13	14.6–19.1 cm
Big kid	1–7	19.7–24.8 cm

Does KEEN run big or small?

From KEEN’s own foot lengths: first against the other brands’ charts, size for size (whether a US size is made for a longer or shorter foot than theirs), then against the standard size tables, foot by foot. Brands measure differently (Nike’s chart, for one, prints a box size in centimetres beside the foot length and says the two differ), so this is what each chart advises, not a fit test.

Men’s

Against the standard size tables, KEEN’s chart gives the same US size for 7 of 13 foot lengths from 24.0 to 30.0 cm (for the other 6, half a size larger or a size larger).

For example, KEEN’s men’s US 9 is for a foot up to 26.0 cm (the standard US 9: 26.25 cm). The other 23 brands’ charts make it for a foot from 26.0 to 27.7 cm: 0 for a shorter foot than KEEN’s, 1 for about the same (within 1 mm) and 22 for a longer one.

Charts that size like KEEN’s: Nike, adidas, HEYDUDE, ANTA, Clarks and Reebok.

Foot by foot

Foot	Standard US	KEEN US
24.0 cm	6.5	7
24.5 cm	7	7.5
25.0 cm	8	8
25.5 cm	8.5	8.5
26.0 cm	9	9
26.5 cm	9.5	9.5
27.0 cm	10	10
27.5 cm	10.5	11
28.0 cm	11.5	11.5
28.5 cm	12	12
29.0 cm	12.5	13
29.5 cm	13	14
30.0 cm	13.5	14

Women’s

KEEN runs small in women’s shoes, against 21 other brands’ charts: size for size, its chart is made for a longer foot than another brand’s 1% of the time, about the same (within 2.5 mm) 21% and a shorter one 78%, typically by half a size. Go about half a size up from the size you wear in most brands, or size from your foot length on its chart.

Against the standard size tables, KEEN’s chart gives the same US size for 7 of 12 foot lengths from 22.0 to 27.5 cm (for the other 5, half a size smaller or half a size larger).

For example, KEEN’s women’s US 8 is for a foot up to 24.1 cm (the standard US 8: 24.1 cm). The other 21 brands’ charts make it for a foot from 24.0 to 25.3 cm: 0 for a shorter foot than KEEN’s, 3 for about the same (within 1 mm) and 18 for a longer one.

Charts that size like KEEN’s: Clarks, Crocs and Reebok.

Foot by foot

Foot	Standard US	KEEN US
22.0 cm	5.5	5.5
22.5 cm	6.5	6
23.0 cm	7	6.5
23.5 cm	7.5	7
24.0 cm	8	8
24.5 cm	8.5	8.5
25.0 cm	9.5	9
25.5 cm	10	10
26.0 cm	10.5	10.5
26.5 cm	11	11
27.0 cm	11.5	12
27.5 cm	12	12

KEEN men’s size chart

US	UK	EU	JP	Foot
7	6	39.5	25	24.4 cm9.61 in
7.5	6.5	40	25.5	24.8 cm9.76 in
8	7	40.5	26	25.4 cm10.00 in
8.5	7.5	41	26.5	25.7 cm10.12 in
9	8	42	27	26.0 cm10.24 in
9.5	8.5	42.5	27.5	26.7 cm10.51 in
10	9	43	28	27.0 cm10.63 in
10.5	9.5	44	28.5	27.3 cm10.75 in
11	10	44.5	29	27.9 cm10.98 in
11.5	10.5	45	29.5	28.3 cm11.14 in
12	11	46	30	28.6 cm11.26 in
13	12	47	31	29.4 cm11.57 in
14	13	47.5	32	30.2 cm11.89 in
15	14	48	33	31.0 cm12.20 in
16	15	48.5	34	31.8 cm12.52 in
17	16	49	35	32.6 cm12.83 in

As printed on KEEN’s chart on keenfootwear.com (checked 2026-10-22). Foot is the foot length the brand gives for the size (the top of the range where it prints one).

KEEN women’s size chart

US	UK	EU	JP	Foot
5	2.5	35	22	21.6 cm8.50 in
5.5	3	35.5	22.5	22.2 cm8.74 in
6	3.5	36	23	22.5 cm8.86 in
6.5	4	37	23.5	23.0 cm9.06 in
7	4.5	37.5	24	23.5 cm9.25 in
7.5	5	38	24.5	23.8 cm9.37 in
8	5.5	38.5	25	24.1 cm9.49 in
8.5	6	39	25.5	24.6 cm9.69 in
9	6.5	39.5	26	25.1 cm9.88 in
9.5	7	40	26.5	25.4 cm10.00 in
10	7.5	40.5	27	25.9 cm10.20 in
10.5	8	41	27.5	26.2 cm10.31 in
11	8.5	42	28	26.7 cm10.51 in
12	9	43	29	27.6 cm10.87 in

As printed on KEEN’s chart on keenfootwear.com (checked 2026-10-22). Foot is the foot length the brand gives for the size (the top of the range where it prints one).

KEEN unisex size chart

US	UK	EU	JP
3.5	2.5	35.5	21.5
4	3	36	22
4.5	3.5	36.5	22.5
5	4	37	23
5.5	4.5	38	23.5
6	5	38.5	24
6.5	5.5	39	24.5
7	6	39.5	25
7.5	6.5	40	25.5
8	7	40.5	26
8.5	7.5	41	26.5
9	8	42	27
9.5	8.5	42.5	27.5
10	9	43	28
10.5	9.5	44	28.5
11	10	44.5	29
11.5	10.5	45	29.5
12	11	46	30
13	12	47	31
14	13	47.5	32
15	14	48	33
16	15	48.5	34
17	16	49	35

As printed on KEEN’s chart on keenfootwear.com (checked 2026-10-22).

KEEN toddler size chart

US	UK	EU	JP	Foot
4	3	19	11.5	11.4 cm4.49 in
5	4	20/21	12.5	12.1 cm4.76 in
6	5	22	13.5	13.0 cm5.12 in
7	6	23	14.5	14.0 cm5.51 in

As printed on KEEN’s chart on keenfootwear.com (checked 2026-10-22). Foot is the foot length the brand gives for the size (the top of the range where it prints one).

KEEN little kid size chart

US	UK	EU	JP	Foot
8	7	24	15	14.6 cm5.75 in
9	8	25/26	16	15.6 cm6.14 in
10	9	27/28	17	16.5 cm6.50 in
11	10	29	18	17.1 cm6.73 in
12	11	30	18.5	18.1 cm7.13 in
13	12	31	19.5	19.1 cm7.52 in

As printed on KEEN’s chart on keenfootwear.com (checked 2026-10-22). Foot is the foot length the brand gives for the size (the top of the range where it prints one).

KEEN big kid size chart

US	UK	EU	JP	Foot
1	13	32/33	20	19.7 cm7.76 in
2	1	34	21	20.6 cm8.11 in
3	2	35	22	21.6 cm8.50 in
4	3	36	22.5	22.2 cm8.74 in
5	4	37	23.5	23.2 cm9.13 in
6	5	38	24.5	24.1 cm9.49 in
7	6	39	25.5	24.8 cm9.76 in

As printed on KEEN’s chart on keenfootwear.com (checked 2026-10-22). Foot is the foot length the brand gives for the size (the top of the range where it prints one).

Find your KEEN size from your foot length

shoesize.app is not affiliated with KEEN. KEEN’s name is used only to identify its own size charts, linked above. An estimate to help you choose: fit varies by model. Not medical advice.