These small envelopes are made out of smooth, high quality, 24lb paper. This assortment includes red, black, blue, lime green, pink and purple envelopes. In total, 150 envelopes are included in this assorted pack! Each one features a straight flap and a reliable gum closure to keep enclosed items secure. Use these envelopes to enclose, sort, and send business cards, small photos, note cards, memos, coins, seeds, and more. Details:Includes an assortment of colors3.125" x 5.5" (#5.5)24 lb.150 envelopes