Description Optical Crystal Deluxe Box Sizes (not including chain): OCKC01 (round): 1 1/2" x 1 1/2" x 3/8" OCKC04 (rectangular block): 1 1/4" x 3/4" x 1/2" OCKC08 (heart): 1 1/4" x 3/4" x 1/2"