The following lists the conversion of US shoe sizes to UK shoe sizes for different groups, including women, men, big kids, young kids, toddlers and babies. For each group, you can see the conversion of every shoe size from the US shoe size system to the UK shoe size system, you can also see the length of each shoe size in inches, cm and millimeters.
(US to UK Conversion) Womens' Shoe Size
US Size
UK Size
Inches
cm
mm
4
2
9
22.8
228
5
3
9.3
23.5
235
6
4
9.5
24.1
241
7
5
9.8
24.8
248
8
6
10
25.4
254
9
7
10.2
26
260
10
8
10.5
26.7
267
11
9
10.7
27.3
273
(US to UK Conversion) Mens' Shoe Size
US Size
UK Size
Inches
cm
mm
4
3
9
22.8
228
5
4
9.3
23.5
235
6
5
9.5
24.1
241
7
6
9.8
24.8
248
8
7
10
25.4
254
8.5
7.5
10.1
25.7
257
9
8
10.2
26
260
9.5
8.5
10.4
26.3
263
10
9
10.5
26.7
267
10.5
9.5
10.6
27
270
11
10
10.7
27.3
273
11.5
10.5
10.9
27.6
276
12
11
11
27.9
279
13
12
11.3
28.6
286
14
13
11.5
29.2
292
(US to UK Conversion) Big kids' Shoe Size
Age
US Size
UK Size
Inches
cm
mm
8-9 years
2
1
8.1 - 8.4
20.7 - 21.3
207-213
9-11 years
2
1.5
8.3 - 8.5
21 - 21.6
210-216
9-11 years
3
2
8.4 - 8.7
21.4 - 22
214-220
10-12 years
3
2.5
8.7 - 8.9
22.1 - 22.7
221-227
10-12 years
3.5
3
8.8 - 9.1
22.4 - 23
224-230
10-12 years
4
3.5
9 - 9.2
22.8 - 23.4
228-234
11-13 years
4.5
4
9.1 - 13.3
23.1 - 23.7
231-237
11-13 years
5
4.5
9.3 - 9.5
23.5 - 24.1
235-241
12-14 years
5.5
5
9.4 - 9.6
23.8 - 24.5
238-245
12-14 years
6
5.5
9.5 - 9.8
24.2 - 24.8
242-248
13-15 years
6.5
6
9.6 - 9.9
24.5 - 25.1
245-251
13-15 years
7
6.5
9.8 - 10
24.9 - 25.5
249-255
16 years +
7.5
7
10 - 10.2
25.3 - 25.9
253-259
16 years +
8
7.5
10.1 - 10.3
25.6 - 26.2
256-262
16 years +
8.5
8
10.2 - 10.4
25.9 - 26.5
259-265
16 years +
9
8.5
10.4 - 10.6
26.3 - 26.9
263-269
16 years +
9.5
9
10.5 - 10.7
26.7 - 27.3
267-273
16 years +
10
9.5
10.6 - 10.9
27 - 27.6
270-276
(US to UK Conversion) Young kids' Shoe Size
Age
US Size
UK Size
Inches
cm
mm
3 years
9
8
6 - 6.3
15.3 - 15.9
153-159
3-4 years
9.5
8.5
6.3 - 6.5
16 - 16.6
160-166
4-6 years
10
9
6.6 - 6.8
16.7 - 17.2
167-172
5-7 years
10
9.5
6.7 - 6.9
17 - 17.6
170-176
5-7 years
11
10
6.8 - 7
17.3 - 17.9
173-179
6-8 years
11
10.5
6.9 - 7.2
17.6 - 18.2
176-182
6-8 years
12
11
7.1 - 7.3
18 - 18.5
180-185
6-8 years
12
11.5
7.2 - 7.4
18.3 - 18.9
183-189
6-8 years
13
12
7.3 - 7.6
18.6 - 19.2
186-192
8-9 years
13
12.5
7.6 - 7.8
19.3 - 19.9
193-199
8-9 years
1
13
7.9 - 8.1
20 - 20.6
200-206
8-10 years
1
13.5
8 - 8.2
20.3 - 20.9
203-209
8-10 years
2
1
8.1 - 8.4
20.7 - 21.3
207-213
9-11 years
2
1.5
8.3 - 8.5
21 - 21.6
210-216
9-11 years
3
2
8.4 - 8.7
21.4 - 22
214-220
10-12 years
3
2.5
8.7 - 8.9
22.1 - 22.7
221-227
10-12 years
3.5
3
8.8 - 9.1
22.4 - 23
224-230
10-12 years
4
3.5
9 - 9.2
22.8 - 23.4
228-234
11-13 years
4.5
4
9.1 - 9.3
23.1 - 23.7
231-237
11-13 years
5
4.5
9.3 - 9.5
23.5 - 24.1
235-241
(US to UK Conversion) Toddlers' Shoe Size
Age
US Size
UK Size
Inches
cm
mm
18-24 months
6
5
5.2 - 5.5
13.3 - 13.9
133-139
2 years
7
6
5.5 - 5.7
14 - 14.5
140-145
2-3 years
8
7
5.7 - 6
14.6 - 15.2
146-152
2-3 years
8
7.5
5.9 - 6.1
14.9 - 15.5
149-155
3 years
9
8
6 - 6.3
15.3 - 15.9
153-159
3-4 years
9.5
8.5
6.3 - 6.5
16 - 16.6
160-166
4-6 years
10
9
6.6 - 6.8
16.7 - 17.2
167-172
5-7 years
10
9.5
6.7 - 6.9
17 - 17.6
170-176
5-7 years
11
10
6.8 - 7
17.3 - 17.9
173-179
6-8 years
11
10.5
6.9 - 7.2
17.6 - 18.2
176-182
6-8 years
12
11
7.1 - 7.3
18 - 18.5
180-185
6-8 years
12
11.5
7.2 - 7.4
18.3 - 18.9
183-189
6-8 years
13
12
7.3 - 7.6
18.6 - 19.2
186-192
8-9 years
13
12.5
7.6 - 7.8
19.3 - 19.9
193-199
(US to UK Conversion) Baby's Shoe Size
Age
US Size
UK Size
Inches
cm
mm
0-1 months
-
-
3.3 - 3.5
8.4 - 9
84-90
0-3 months
-
0
3.6 - 3.9
9.1 - 9.8
91-98
3-6 months
2
1
3.9 - 4.1
9.9 - 10.4
99-104
6-9 months
3
2
4.1 - 4.4
10.5 - 11.1
105-111
6-9 months
4
3
4.4 - 4.6
11.2 - 11.8
112-118
9-12 months
5
4
4.7 - 4.9
11.9 - 12.5
119-125
12-18 months
6
4.5
5 - 5.2
12.6 - 13.2
126-132
18-24 months
7
5
5.2 - 5.5
13.3 - 13.9
133-139
2 years
8
6
5.5 - 5.7
14 - 14.5
140-145
Since the shoe standards of different regions and different manufacturers are different, the above size conversion chart can only be used as a reference
