A hook and eye fastener for securing two pieces of a garment together includes a hook part for mounting on one of the pieces and an eye part for mounting on of the other of the pieces. The eye part comprises a frame having an open mouth defined by a circumferential lip. The lip has a pair of slots formed therein. The hook part comprises a body and arm. The arm comprises an inner portion connected to the body and an outer portion connected to inner portion. A plurality of ribs are provided along the rear surface of the inner portion and a pair of divider walls are provided along the front surface of the inner portion, nestled below the outer portion. The divider walls project forwardly for location in the slots of the lip. The fastener is relatively slim, easy to use, and capable of withstanding high tensile forces.