A selection of comic storage supplies that I use myself and recommend.
Made of Archival Polyester Mylar Fits standard Silver Comic Books 2 mil material thickness Crystal clear Exterior Dimensions: 7 1/4 x 10 1/2 + 1 1/2
BCW Silver Comic Mylar Bags 2 Mil - Comics, Comic Books Storage Collecting Supplies, 7 1/4 X 10 1/2 50 Pack
Gemini Comic Box Mailers - Current Size, Shipping Box for Comic Books, Corrugated Cardboard Packaging Supplies, Book Shipping Boxes
Fits most Silver Age comic books 1 1/2 flap for closure Acid free, archival safe No PVC Use with BCW Silver Age Backing Boards Dimensions: 7 1/8 X 10
BCW Comic Bags, Silver 7 1/8 X10 1/2 + 1 1/2 Flap 2 mil Polypropylene (100 ct)
SideKick Supplies
Comic Book Supplies - CSE
MONTHLY COMICS
Resin Material Storage Boxes Comic Book Album Organizer Box Dvd Disc Storage Items Active Partition Home Supplies - AliExpress
Comic Book Boxes, Plastic & Cardboard Comic Book Storage Boxes - BCW Supplies
Comic Supplies – Kraven's Comic Books and Collectibles