1000 EcoSwift 4 x 5 White Small Poly Mailer Size #00s Self Sealing Envelopes Plastic Shipping Mailing Bags 4x5 1.7 mil Size: #00s (1.7 mil) Dimensions: 4" x 5" EcoSwift Self-Sealing, Peel and Stick Adhesive Quantity: 1000