EcoSwift Size #8 19x24 Poly Mailers Self Sealing Bulk Shipping Supplies Packaging Materials Envelopes Bags 2.35 Mil EcoSwift Size #8 19x24 Poly Mailers Self Sealing Bulk Shipping Supplies Packaging Materials Envelopes Bags 2.35 Mil Size: #8 Dimensions: 19" x 24" Thickness: 2.35 mil EcoSwift Self-Sealing, Peel and Stick Adhesive