Custom-size stretcher bars | Full set of a stretching system for your custom-size artwork STRETCHING BARS SPECIFICATION: 1" deep by 1,5" height profile, custom length & width. The stretching range is +/- 1/8" of an ordered size. These stretchers are strong and perfectly keep canvas load. HOW TO ORDER: Calculate the "Perimeter Length" of the stretcher by adding the length and width twice (length + width + length + width). Choose the range that matches your perimeter length. For example, for a 47"x37" frame, the perimeter length is 168" (47" + 37" + 47" + 37"), so you would select the "160-169 inches" option. BENEFITS: - Any size, any ratio, with inch or centimeter. - No experience needed: easily reassembled and restretched. ORDER INCLUDES: - Calibrated set of stretcher bars with your dimensions (four bars + braces if needed, depending on size) - Set of keys to stretch the system. - Set of hooks with screws to hang your artwork on a wall. ORDER THE RIGHT SIZE: "Your canvas should be 2 inches larger on each side than the stretcher frame for a gallery wrap (to secure it on the back). Example 1: For a 40"x60" canvas, order a 36"x56" frame. Example 2: For a 40"x60" canvas with a 35"x50" artwork, order 35"x50" stretcher bars.