I design and create all my crosses and shadow boxes. Each one is unique.
These shadowboxed crosses make excellent Christmas, Mother's Day, Father's Day, Birthday, Wedding or Anniversary gifts. I also make them for baby's, girl's or boy's room.  The shadow box casings are of a depth to nicely accommodate the cross (depending on the design), background and glass front; usually approximately 1" to 1 1/2".  I make the boxes in various sizes, mostly 8" X 10" or 5" x 7".  
Note: The photos do not do these shadow boxes justice.  
 See comments from my customers.