Watch this product and we will notify you once it is back in stock.
The diameter is 51 mm (2 in.) and the depth is 20 mm (0.87 in.), including the push button. The back builds 11 mm (0.43 in.) into the wall/door, and a hole with a diameter of at least 15 mm (0.59 in.) is required behind the push button. Comes with three 17 mm (0.67 in.) brass screws for mounting. Doorbell and transformer not included, see below under "Related Products."