Use the chart below to convert between US, UK, EU and JP sizes.
Men
US
UK
EU
JP (cm)
3.5
3
35.5
22.5
4
3.5
36
23
4.5
4
36.5
23.5
5
4.5
37.5
23.5
5.5
5
38
24
6
5.5
38.5
24
6.5
6
39
24.5
7
6
40
25
7.5
6.5
40.5
25.5
8
7
41
26
8.5
7.5
42
26.5
9
8
42.5
27
9.5
8.5
43
27.5
10
9
44
28
10.5
9.5
44.5
28.5
11
10
45
29
11.5
10.5
45.5
29.5
12
11
46
30
12.5
11.5
47
30.5
13
12
47.5
31
13.5
12.5
48
31.5
14
13
48.5
32
14.5
13.5
49
32.5
15
14
49.5
33
15.5
14.5
50
33.5
16
15
50.5
34
16.5
15.5
51
34.5
17
16
51.5
35
17.5
16.5
52
35.5
18
17
52.5
36
18.5
17.5
53
36.5
19
18
53.5
37
19.5
18.5
54
37.5
20
19
54.5
38
20.5
19.5
55
38.5
21
20
55.5
39
21.5
20.5
56
39.5
22
21
56.5
40
Women
US
UK
EU
JP (cm)
3.5
1.5
33.5
21
4
1.5
34.5
21
4.5
2
35
21.5
5
2.5
35.5
22
5.5
3
36
22.5
6
3.5
36.5
23
6.5
4
37.5
23.5
7
4.5
38
24
7.5
5
38.5
24.5
8
5.5
39
25
8.5
6
40
25.5
9
6.5
40.5
26
9.5
7
41
26.5
10
7.5
42
27
10.5
8
42.5
27.5
11
8.5
43
28
11.5
9
44
28.5
12
9.5
44.5
29
12.5
10
45
29.5
13
10.5
45.5
30
13.5
11
46
30.5
14
11.5
47
31
14.5
12
47.5
31.5
15
12.5
48
32
15.5
13
48.5
32.5
16
13.5
49
33
16.5
14
50
33.5
17
14.5
50.5
34
17.5
15
51
34.5
18
15.5
51.5
35
18.5
16
52
35.5
19
16.5
52.5
36
19.5
17
53
36.5
20
17.5
53.5
37
20.5
18
54
37.5
21
18.5
54.5
38
21.5
19
55
38.5
22
19.5
55.5
39
22.5
20
56
39.5
Kids
US
UK
EU
JP (cm)
1C
0.5
16
7
2C
1.5
17
8
3C
2.5
18.5
9
4C
3.5
19.5
10
5C
4.5
21
11
6C
5.5
22
12
7C
6.5
23.5
13
8C
7.5
25
14
9C
8.5
26
15
10C
9.5
27
16
11C
10.5
28
17
12C
11.5
29.5
18
13C
12.5
31
19
1Y
13.5
32
20
1.5Y
1
33
20.5
2Y
1.5
33.5
21
2.5Y
2
34
21.5
3Y
2.5
35
22
3.5Y
3
35.5
22.5
4Y
3.5
36
23
4.5Y
4
36.5
23.5
5Y
4.5
37.5
23.5
5.5Y
5
38
24
6Y
5.5
38.5
24
6.5Y
6
39
24.5
7Y
6
40
25
Free U.S. shipping · Authenticity guaranteed
14-day returns for store credit & equal-value exchanges — policy
Size, price & UPC details
Size
Price
UPC
Delivery
US W 5 / M 3.5
—
193150591709
Out of stock
US W 5.5 / M 4
—
193150591716
Out of stock
US W 6 / M 4.5
—
193150591723
Out of stock
US W 6.5 / M 5
—
193150591730
Out of stock
US W 7 / M 5.5
—
193150591747
Out of stock
US W 7.5 / M 6
—
193150591754
Out of stock
US W 8 / M 6.5
—
193150591761
Out of stock
US W 8.5 / M 7
—
193150591778
Out of stock
US W 9 / M 7.5
—
193150591785
Out of stock
US W 9.5 / M 8
—
193150591792
Out of stock
US W 10 / M 8.5
—
193150591808
Out of stock
US W 10.5 / M 9
$541.60
193150591815
3-4 business days
US W 11 / M 9.5
—
193150591822
Out of stock
US W 11.5 / M 10
—
193150591839
Out of stock
US W 12 / M 10.5
$198.40
193150591846
3-4 business days
US W 12.5 / M 11
—
193150591853
Out of stock
US W 13 / M 11.5
$189.60
193150591860
3-4 business days
US W 13.5 / M 12
—
193150591877
Out of stock
US W 14 / M 12.5
$192.90
193150591884
5-7 business days
US W 14.5 / M 13
$192.90
193150591891
5-7 business days
US W 15.5 / M 14
$183.00
193150591907
3-4 business days
US W 16.5 / M 15
—
193150591914
Out of stock
About the Undercover x Nike Wmns Daybreak 'Black Sail'
Nike collaborated with Japanese designer Jun Takahashi to create the Undercover x Wmns Daybreak 'Black Sail,' a futuristic take on a classic runner from the late 70s. The old-school silhouette made famous by Joan Benoit Samuelson's 1984 Olympic Marathon victory gets remade with unconventional details in this concept shoe released June 2019. Among changes to the original design is a sharp, speckled heel clip that angles up to the back of the collar for dramatic effect.