Card Vault
Inspired entirely by http://www.sendwonder.com/products/the-vault, this is a protector for a U.S. Playing Card Company standard poker sized deck of playing cards. Two versions, one plain and one with a diamond pattern because, with 3D printing complexity is free.
New: Added a vault for a mini-deck purchased at L.L. Bean: 65.5 x 46 x 19 mm.