HOW CANADIAN FORCES BOOT SIZING WORKS

THE FIRST 3 DIGITS ARE THE LENGTH OF FOOT IN MILLIMETERS
THE LAST 3 DIGITS ARE THE WIGTH OF FOOT IN MILLIMETERS

EXAMPLE: A BOOT SIZE OF 280/102 IS SUITED FOR SOMEONE WITH A FOOT LENGHT OF 280 MM AND A WIGTH OF 102 MM

APPROXIMATE SIZING FROM MM TO US 

230MM = 6    US 
235MM = 6.5  US
240MM = 7    US
245MM = 7.5  US
250MM = 8    US
255MM = 8.5  US
260MM = 9    US
265MM = 9.5  US
270MM = 10   US
275MM = 10.5 US
280MM = 11   US
285MM = 11.5 US
290MM = 12   US