40 Mailers 10x13 Red Polymailers shipping envelopes self sealing bags $22. Super cute to send to the buyer!! Features & details Unsurpassed Water & Tear Resistance - Superior side seams combined with Heavy Duty polyethylene make these High Quality envelopes highly resistant to water, punctures, and tears Pressure sensitive self seal - Easy packing, tamper-evident, and super secure closure Light Weight & Time Saving - Lower shipping costs combined with faster shipment preparation equal big savings over other packaging option 100% recyclable 10"x13"