Smead Project Envelope, 1-1/4" Expansion, String-Tie Closure, Side Load Letter, Assorted Colors. Tough and acid free, these colorful envelopes feature 1-1/4" gussets, big enough to hold over 200 sheets of paper. String-tie closure secures contents. Durable poly material is tear proof and water resistant. Each individual pack contains 5 Project Envelopes, Bundle of 6 packs, 30 Envelopes total.