Shadow Box Frame 3D model

Created to hold a 12x12 mirror for my laser etching artwork, noticed there wasn't a file readily available. Wooden ones of this size go for $20 to @40 a piece,why not make one that I can easily print multiples of for alot less.The overall frame is 13by 13 with a lip on the front, and comes with a 12by 12 support to slide behind your work(the mirror for me)It has an open back for you to add cardboard, wood, etc... Hope you like it.