Beautiful beveled acid free pre-cut mats, economically bulk packed and shrink wrapped. No backing sheets. Perfect for large projects. Made in USA.8 in. x 10 in. mats have 4.5 in. x 6.5 in. opening 11 in. x 14 in. mats have 7.5 in. x 9.5 in. opening 16 in. x 20 in. mats have 10.5 in. x 13.5 in. openingAssorted pack contains black, white, grey, and gulf blue.