UK 4.5 in US and EU sizes

An adult UK 4.5 is a men’s US 5.5 and a women’s US 7 (EU 36.5–37), for a foot of 22.9 to 23.3 cm.

A kids’ UK 4.5 is much smaller: a kids’ US 4.5C–5C, for a foot of 11.85 to 12.3 cm.

On the brands’ own men’s charts, UK 4.5 is US 5.5 at ANTA, ASICS and 5 more; US 5 at adidas, HOKA and 4 more; US 4.5 at Converse. Brands size their shoes on their own lasts, so check the brand you’re buying.

Convert another size

I know my
Sizes for

UK 4.5 in every size system

SystemMen’s (adult UK 4.5)Women’s (adult UK 4.5)Kids (kids’ UK 4.5)
Foot length (cm)22.9–23.322.9–23.311.85–12.3
US5.574.5C–5C
EU36.5–3736.5–3720–20.5
Mondopoint (mm)230–235230–235120–125
Japan (cm)23–23.523–23.512–12.5
Australia and NZ4.574.5
South Korea (mm)230–235230–235120–125
China (mm)230–235230–235120–125
Mexico (cm)23–23.523–23.512–12.5
Brazil353518–19
Argentina, Uruguay, Paraguay363619–20

From the standard size tables. A size fits a range of feet; where that range spans two sizes in another system, both are shown. A dash means the system has no size there.

What 31 brands print next to UK 4.5

BrandMen’s chartWomen’s chartKids’ chart
adidasUS 5UK 4.5 · EU 37 1/3US 6UK 4.5 · EU 37 1/3US 5UK 4.5 · EU 37 1/3
Allbirds—US 7.5UK 4.5—
ANTAUS 5.5UK 4.5 · EU 38US 7UK 4.5 · EU 38US 5YUK 4.5 · EU 37
ASICSUS 5.5UK 4.5 · EU 38US 6.5UK 4.5 · EU 37.5—
Bata——EU 21UK 4.5
Birkenstock—EU 37US 6-6.5 · UK 4.5EU 37US 6-6.5 · UK 4.5
BrooksUS 5.5UK 4.5 · EU 38US 6.5UK 4.5 · EU 37.5—
Clarks—UK 4.5US 7 · EU 37.5UK 4.5US 5 · EU 20.5
ConverseUS 4.5EU 37US 6.5UK 4.5 · EU 37US 4.5CUK 4.5 · EU 20.5
Dr. Martens——UK 4.5US 5.5 · EU 21
GucciUK 4.5EU 38.5EU 37.5UK 4.521US 5 · UK 4.5
HOKAUS 5UK 4.5 · EU 37 1/3US 6UK 4.5 · EU 37 1/3—
JordanUS 5UK 4.5 · EU 37.5US 7UK 4.5 · EU 38US 5CUK 4.5 · EU 21
KEEN—US 7UK 4.5 · EU 37.5—
Merrell—US 7UK 4.5 · EU 37.5US 5.5UK 4.5 · EU 21.5
MizunoUS 5.5UK 4.5 · EU 37US 7UK 4.5 · EU 37—
New BalanceUS 5UK 4.5 · EU 37.5US 6.5UK 4.5 · EU 37US 5UK 4.5 · EU 21
NikeUS 5UK 4.5 · EU 37.5US 7UK 4.5 · EU 38US 5CUK 4.5 · EU 21
On—US 6.5UK 4.5 · EU 37.5US 5UK 4.5 · EU 21
Onitsuka TigerUS 5HUK 4.5 · EU 38US 6HUK 4.5 · EU 37.5—
PUMA—US 7UK 4.5 · EU 37.5US 5.5UK 4.5 · EU 37.5
Salomon—US 6UK 4.5 · EU 37 1/3—
SauconyUS 5.5UK 4.5 · EU 38US 7UK 4.5 · EU 385.5 Little KidsUS 5.5 · UK 4.5 · EU 21.5
Skechers—US 7.5UK 4.5 · EU 37.5US 5.5UK 4.5 · EU 21
SOREL—US 6.5UK 4.5 · EU 37.5—
TevaUS 5.5UK 4.5 · EU 37.5US 6.5UK 4.5 · EU 37.5—
TimberlandUS 5UK 4.5 · EU 37.5US 6.5UK 4.5 · EU 37.5US 5UK 4.5 · EU 21
UGGUS 5.5UK 4.5 · EU 38.5US 6.5UK 4.5 · EU 37.5US 5UK 4.5 · EU 21.0
Under Armour—US 6.5UK 4.5 · EU 37.5US 5KUK 4.5 · EU 21
VansEU 37UK 4.5EU 37US 7 · UK 4.5US 5CUK 4.5 · EU 21
VejaEU 37.5US W6.5 · UK 4.5EU 37.5UK 4.5—

The row each brand’s own chart prints for UK 4.5, linked. Brands without that exact size on a chart are left out. Not affiliated with any brand.

Size tables checked 2026-10-23; brand sizes from each brand’s own chart, linked above. An estimate to help you choose: fit varies by brand and model. Not medical advice.