Check the listing for details. 100 19x24 Blue Poly Mailers Self Sealing Shipping Envelopes Bags 2.5 Mil. Condition: New. Listed at 24.95 USD. Product Features: ---Usable Space: 19” x 24” - Width X Length. ---Thickness: 2.5 Mil. ---Color: Blue - conceals packages from visibility. ---Made from premium polyethylene - which enables easy label, stamp, and ink application. ---Plain exterior - ideal for logo/brand printing and marketing. ---High adhesive seal strip - packages are tightly secured. ---Provides excellent protection during shipments. ---Puncture-resistant and tamper/waterproof. ---Approved by UPS, FedEx, and USPS. ---Ideal for non-fragile medium-size shipments. ---Economical shipping method - substantially less expensive than using corrugated boxes and mailing tubes. ---The interior color of the mailer is subject to change.Product Features: ---Usable Space: 19” x 24” - Width X Length. ---Thickness: 2.5 Mil. ---Color: Blue - conceals packages from visibility. ---Made from premium polyethylene - which enables easy label, stamp, and ink application. ---Plain exterior - ideal for logo/brand printing and marketing. ---High adhesive seal strip - packages are tightly secured. ---Provides excellent protection during shipments. ---Puncture-resistant and tamper/waterproof. ---Approved by UPS, FedEx, and USPS. ---Ideal for non-fragile medium-size shipments. ---Economical shipping method - substantially less expensive than using corrugated boxes and mailing tubes. ---The interior color of the mailer is subject to change.