14 1/4 x 20 Kraft (Freight Saver Pack) #7 Self-Seal Bubble Mailers. Bubble lined mailers provide light-weight protection for your products. Mailers feature a 3/16 high slip bubble lining for easy insertion of products. Peel and stick lip provides a secure tamper evident closure. Recycled golden kraft paper exterior. Overall mailer dimensions: 8 W x 11 L. Made out of Kraft stock. Perfect for mailing fragile items. #7 Mailer. Air-bubble lining protects contents during shipping. Convenient self-sealing closure. Contains 30% recycled plastic (15% post-consumer content). Sold as 25 Per Case.