JAM PAPER 10 x 13 Open End Catalog Colored Envelopes with Clasp Closure - Blue Recycled - 100/Pack Color: Blue Size: 10 x 13 inches Quantity: 100 envelopes per box Envelopes are made from smooth 28lb paper, include both gummed flap closure and folding metal clasp Great to use for organizing documetns, distributing promotional and marketing materials, mailing, filing and much more