Buy these JAM Paper 9.88" x 11.63" Lime Green Plastic Tuck Flap Open End Envelopes, 12ct. at Michaels.com. Their tuck flap closures are composed of a rectangular tab that tucks in to a slit in the front of the envelope. They are perfect for all kinds of standard sized documents that you want to keep safe from tearing, crumpling, bending, stains and other damage. Use them at school, the office or at home.