20-1/2" x 5-1/4" x 2-1/2"

 Other Items from Misc.

  Onlay 5-1/8" wide x 15-1/2" high x 7/8" deep  - each
  27-3/4" wide x 12" high x 1" deep - each
  Corner Block 4-1/4" square x 1-3/8" (1")  - each
  5-3/4" wide x 14-7/8" high x 3/8" deep  - each
  Arch and Moulding - 
  5-1/4" wide x 17-1/4" high x 3/8" deep - each
   8" x 10-7/8" x 3" - each
  10-1/4" x 14-1/8" x 1-3/8" - each
  11-3/4" x 46-1/2" x 1" - each
  46-3/4" x 11-1/2" x 1-1/4" thick - each
   4-1/8" x 5-1/4" x 2-1/8" - each