Quality Park Clasp Envelope, Recycled, 10 x 13, 28lb, Light Brown, 100/Box Reusable envelope is ideal for office, school and home use. Durable double prong metal clasp and reinforced eyelet. Heavily gummed flap closure. Envelope Size: 10 x 13; Envelope/Mailer Type: Catalog/Clasp Mixed Colors; Closure: Clasp/Gummed Flap; Trade Size: #97. Deep gumming for a secure seal.Quality Park