11" x 11” Natural Oak MDF Wood Shadow Box Frame – FrameWorks
Amazon.com - 18x18 Shadow Box Gallery Wood Frames - Black DEEP Shadowbox Frame with a Display Depth of 3/4" - Shadowbox Frame Includes Shatter Proof UV Acrylic Front, Acid Free Interior, and
4-Pack Black Shadow Box, 5" x 7" By Studio Décor® | Michaels
Amazon.com - Golden State Art, 8x10.5 Shadow Box Frame Display Case, 2-inch Depth, Great for Collages, Collections, Mementos, 6 Pins Included (Black, 1 Pack)
How To Make A Simple DIY Shadow Box Frame For Large Artwork - Addicted 2 Decorating®