Enhance students' artwork for art fairs and displays with this assortment of mats. There are twelve each of five sizes: 4 x 6, 5 x 7, 9 x 12, 12 x 18 and 18 x 24. The mats hang vertically or horizontally. Each frame is made from 100% total recycled content. Frame Type: Mat; Frame Material: N/A; Frame Color: White; Height: N/A.