Cels Forum

Sheet music bags (standard size 9.5" x 12.25") can be used for "normal" size cels.
All of the ones I have seen are made from polypropylene
(so they are OK for use with cels).
I got a package of 100 for $7.50 from a local comic book store.
I assume that they would be available at most 
stores that sell sheet music but have not checked since
they were readily available at local comic book stores.