Canvas stretching.

We stretch a lot of canvases, both painted and unpainted. Depending upon the size of the canvas, we have 5 different sizes of wood stretcher bars we use (light-weight, medium-weight, heavy-weight as well as 1 1/2" or 2" deep "Gallery Wrap" styles). We also believe in using cross bars to prevent canvases being stretched from developing an hourglass shape.