I'm looking for a pattern for a zippered pouch that I can modify for a project I want to do.
What I want is something that has the zipper running around 3 sides and can open like a book, but I'm having trouble searching because I don't know what to properly call something like that. I thought it was a clamshell, but that seems to be a type of wide mouthed pouch with a zipper at the top

Any suggestions?

#Sewing