25 pack of white mailers with Redi-Strip closure. Similar to https://www.amazon.com/BOX-USA-Self-Seal-Mailer-Stayflats/dp/B081ZS99M4/ref=mp_s_a_1_2_sspa?adgrpid=162719794027&dib=eyJ2IjoiMSJ9.goS5kUW19sADb3Vi0YH-r73zmwP7Du_GNu3_2R5iusap-yoioLO8y_RI-23QmPHhEwEYTv-voLrH01njgc4zK1lQg0K2XAdDrrHvj4ZMwvZuRHRJy7BhhmOoYiBKfhxuXeAwL1qyaDvaM9iRbq5NdYYs5I2D2iQPnwHoBK7CJw9FBO0Jb4U-BYs2TU3Oshm8iwPTDxKHylMEbuUeB-Miww.rOf_3BEuhI27pHhezJOiljmaQVW92IUzInUbHCCaFwg&dib_tag=se&hvadid=693013267363&hvdev=m&hvexpln=68&hvlocphy=1028087&hvnetw=g&hvocijid=18049692013235548566--&hvqmt=b&hvrand=18049692013235548566&hvtargid=kwd-345397078968&hydadcr=14893_13353744&keywords=9+x+11+mailer&mcid=841b4b5fb04a391da9cc9575f084e011&qid=1743970858&sr=8-2-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&psc=1