These zip-close foil envelopes are excellent for long term seed storage. The zipper keeps moisture out, even in the freezer, and heavy puncture resistant foil keeps seeds safe and keeps light out. These 6.5" x 5" bags will easily hold 1/2 pounds of beans or corn, or ten paper seed packets. There is a gusset at the bottom so the packets will stand up when filled. You can write on them with permanent marker for seed identification. Be sure your seeds are completely dry before placing in the foil packet.