Blick Simplon Econo Wood Frame - 8" x 10" x 3/8",

Open Back Frames - These frames are meant to be hung on the wall and are sold as just the frame face. They are not shipped with backing material, glazing material, or hanging hardware. The open back frames are commonly used for traditional profile stretched canvases and panels.
Frame Dimensions - Frames are sized by their opening, not by the outside of the molding. To determine the size of frame to order, measure the outside of your artwork, matboard, or panel, and order that size frame. The frame will overlap your artwork approximately 1/4" all the way around, so your artwork will fit securely behind the frame's molding.
Frame Depth/Rabbet - The rabbet or depth of a frame refers to the cut-out area behind the frame's molding that holds your artwork in place). To find a frame that will accommodate your artwork, measure the depth of the artwork, including any matting or mounting materials, and order a frame with a depth that is, at a minimum, the same as that measured depth.