Some great options with Rainbow Packages May 15th 2017 Myron Arndt What is a Rainbow Package? These packages of discounted mats (usually 25 to a package) are mats in several standard outside sizes that are assorted colors and with openings to match common photo and art sizes such as 5 x 7, 8 x 10 and 11 Tags: #rainbow packages #mats for schools #art mats #matboards for fundraising