Removable covering cap (1) for a substantially cylindrical button (2), of the type comprising an upper portion (10) and coupling means for removably constraining said covering cap (1) to the button (2), and wherein such coupling means comprise at least one annular-shaped side wall (12) jutting from the aforesaid upper portion (10) and shaped so as to engage at least partially with at least part of the outer surface of the button (2). The aforesaid annular-shaped side wall (12) is at least in part elastically deformable between a narrow shape for being retained in engagement with said button (2) and a widened shape for the at least partial insertion of said button (2) into said annular-shaped side wall (12). The cap advantageously comprises at least one substantially laminar rigid body (11) coupled on the outside of at least said upper portion (10) of the cap (1) or forming at least part thereof, and which has at least part of an ornamental pattern (14) on its outer surface.