US
sizes go up in
half sizes so a US 9 1/2 is
half way in length between a 9 and a 10. Width is then measured by letters (from A - narrow - to E - wide) or as 'Narrow', 'Regular' or 'Wide'. UK
sizes use 1/2 to indicate a wide
fit so a UK 9 1/2 is a wide fitting
size UK 9.
read more >>