Brass stencils that are interlocking and are available in sets of A-Z, 0-9 and also a 76 piece set that contains 2 sets of all letters and 1 set of numbers, plus an extra four 0 and 1, three decimal points, a pond sign, hyphen, comma, apostrophe, beginner and end. The sizes available are 25mm, 38mm, 50mm, 63.5mm and 76mm. Larger are available to order.