TOP QUALITY SELF SEAL GREY RECYCLED MAILING BAGS. 9 x 12 (230mm x 300mm) Medium. The seller is britishpaper and is located in this country GB. 14 x 19 (350mm x 480mm) XX Large. Grey strong mailing postage mixed bags plastic postal poly mail parcel self seal 6 x 9 (165mm x 230mm) small.