How do I know if I need Small, Medium or Large? By SGAdmin on March 7, 2023 in A How do I know if I need Small, Medium or Large? Category: Sizing Small bracelets are typically for skinny ladies and teenagers with wrists less than 6.5″ (16.5cm). Large is for larger ladies and big men with wrists over 7.5″ (19cm). Medium is for every one else.