Buy the JAM Paper 9.63" x 11.63" Blue Plastic Hook & Loop Closure Booklet Letter Envelopes with Expansion, 120ct. at Michaels.com. The plastic cover is the perfect material for when you want your things to endure spills or drops. These envelopes are ideal for storing multiple standard sized sheets of paper. Our 1" expansion will let you put even more documents inside without having to shove them in and cause for chaos.