US(Crocs)
& AUS

EU 

Metric
(millimeters)

M4

35.5

216 – 223

M5

37

225 – 232

M6

38

233 – 240

M7

39

241 – 248

M8

41

249 – 256

M9

42

259 – 267

M10

43

268 – 275

M11

44.5

276 – 283

M12

46

284 – 291

M13

47

292 – 299

US(Crocs)
& AUS

EU 

Metric
(millimeters)

W3

-

200 – 207

W4

33

208 – 215

W5

35

216 – 223

W6/ M4

35.5

225 – 232

W7/ M5

37

233 – 240

W8/ M6

38

241 – 248

W9/ M7

39

249 – 256

W10/ M8

41

259 – 267

W11/ M9

42

268 – 275

W12/ M10

43

276 – 283