Kraft Bubble MailerExtremely lightweight – quality & EASY to use, the bubble lined shipping and packaging envelopes are lightweight and do not add to your shipping costs.Model Size: #0Inner Size: 6×9+1.0 flapUltra-secure mailing option – opt in for these secure and sturdy Kraft bubble mailer padded envelopes and be sure that your package will be safe from damage and tampering! The go-to option for millions of shipments because of the sturdy built with bubble lined wall construction for extra protection during transit.