This is just a fragment, though whether the remains of a once larger whimsy or some other sort of crown of thorns construction, I'm not totally sure. It is definitely an old one, dry wood surface, and could be hung symmetrically from a nail on the wall via one of the long extending pieces.
6 7/8 x 6 7/8 x 5 1/16 as found. Losses as evident, but stable as is.