This little ring will please all knitters! At the end of each row, press the large button to record it, and the ring will add it to the previous ones, so you won't lose count! To reset it to zero, simply press the reset button. Can be attached to a finger with its adjustable strap. Plastic. Strap: 10.5 x 1.5 cm; counter housing: 3 x 2.5 x 1 cm approx. 1 button cell battery (provided).