The flexible sleeve fits perfectly on the iPad 4! Seat bombproof and a Smart Cover is still restricted, usable. But limited because the shell can withstand about 3mm over the iPad frame, ie the Smart Cover closes naturally from not as good as without cover! In addition, some negative attention that is the shell at the points where the holes for speakers and volume controls are not rests 100% ... through the cutouts, the casing bulges slightly outwards ..!