Lion Two-Tone Opaque Poly Envelope with Gusset, Letter, Side Load, String and Button Closure, Blue, Pack of 4 (32230-BL-4P) Letter size Nylon string and steel riveted button closure Side loading 1-1/6" gusset Overall dimension: 11.6"W x 9.7"H Recyclable polypropylene material Blue (two-tone cover, outside in bold opaque with classic black interior) 4ea per pack