Framatic Black Metro Panel Frame 4"x6" with 2.5"x3.5" Mat Opening: The Metro Frame features a 1.75" wide face. Mouldings that are attached to the back of frame are used to create space for up to four thicknesses of matboard, glass and chipboard backing. A dowel included with sizes up to 11"x14" acts as an easel for tabletop display.