The individual links in Rolex's riveted bracelets were designed to be sized by removing the rivets, adding/removing links as required, & then fitting new rivets. Since replacement rivets have not been available for many years, the only option, now, is to unfold the links for resizing. Rolex had a tool that performed the operation with minimal damage to the link, but I do not know which RSCs (if any) still have it nor have I ever run across an independent watchmaker who had 1.