Quality Park Redi-strip Catalog Envelope – Catalog – #12 1/2 [9.50″ X 12.50″] – 28 Lb – Peel & Seal – Wove – 100/box – White (QUA44682). Seam Type: Center; Flap Type: Cheese Blade; Trade Size: 12 1/2; Security Tinted: No.