Top-Print Self-Adhesive Packing List EnvelopeMoisture and tear resistant plastic envelope protects packing lists from water and handling damage. Permanent adhesive backing keeps documentation securely in place. Printed "Packing List/Invoice Enclosed." Large, clear window under printing allows shipping papers to show through and serves as address label. Envelope Size: 5 1/2 x 4 1/2; Envelope/Mailer Type: Packing List; Closure: Self-Adhesive.