JAM Paper® Plastic 3 Hole Punch Binder Envelopes keep your documents organized and protected and for into 3 ring binders!JAM Paper® Clear Letter Booklet Plastic Binder Envelopes with Hook & Loop Closure and 3 Hole Punch are 9.75 x 13inches in size and have a 1-inch expansion. Each one has 3 binder holes on its bottom spine that allows it to fit perfectly into a standard sized 3 ring binder. This pack includes 12 envelopes. Composed of thin and pliable, yet sturdy and protective plastic, these envelopes are ideal for standard sized documents that you want to store, keep safe, and easily carry around inside of a binder. They reliably guard your papers again tearing, bending, stains, and more. The certified Hook & Loop Closure of these envelopes ensure that they close tightly and can be opened easily. Their clear quality provides the added convenience of being able to view their contents from the outside.