JAM Paper & Envelope white booklet envelopes are designed to fit large contents without folding, bending, or creasing. We know how important it is to maintain presentation when sending contracts, tax paperwork, promotions, or marketing material, so we made these 10" x 13" white envelopes. However, you use our high-quality envelopes to provide versatility and style. This pack contains 25, 10" x 13" envelopes and is made from 28 lb. paper.