JAM Paper® Clear Booklet Tuck Flap Envelopes are made of pliable, study, semi-translucent plastic and come in packs of 12. Each one is 5.5 x 7.375 inches in size. Their tuck flap openings consist of a curved tab in the top straight flap opening that folds into a slot in the front of the envelope for secure closing and easy opening. These envelopes are great for storing and protecting standard sized documents as small items, such as keys, scissors, and pens. They are resistant to tearing, bending, scratches, and stains. Use them to keep your documents guarded from damage at home, at the office, or wherever your documents may travel.