JAM PAPER 6 x 9 Open End Catalog Colored Recycled Envelopes - Red Recycled - 100/Pack Christmas Red open end catalog envelopes Size: 6 x 9 inches 100 envelopes per box Made of 28lb paper with a smooth finish, straight flap and gum closure. These fun, colorful envelopes are perfect for making your mail stand out from the pile!