This replacement sole is for the Dexter SST THE 9 Only. These will not work on any other SST Shoes. This sole has an interlocking Toe Hold System. The toe hold clip on the interchangeable sole secures to the shoe by a recessed track. A highly abrasion resistant toe material on the interchangeable sole prevents peel-back and helps prolong wear. X-Small: Mens 5-6.5 Small: Mens 7-8.5 Medium: Mens 9-10.5 Large: Mens 11-12 X-Large: Mens 13-15