50 EcoSwift 10 x 12 White Small Poly Mailer Size #4s Self Sealing Envelopes Plastic Shipping Mailing Bags 10 x 12 1.7 mil Size: #4s (1.7 mil) Dimensions: 10" x 12" EcoSwift Self-Sealing, Peel and Stick Adhesive Quantity: 50