This 12” BEST lightweight stretcher bar created from high quality white pine. White pine is an affordable wood which is also strong and durable, and A perfect stretcher bar for lightweight paintings. Pine is a sustainable wood, and there is a larger quantity of thin pine available in the shorter length. A good choice for new artists, students, and for smaller works that don’t need strong stretcher bars. Not for use on large canvases. BEST stretcher bars are cut 1/8” shorter than the measure that is listed to ensure that the canvas can fit into a photo frame. Stretching the canvas adds extra width to the frame.