Transformers Twin Reversible Comforter. Transformers Age of Extinction- Silver Light, Optimus Prime, Bumble Bee, Grimlock Set includes a twin size comforter. Twin Comforter Size - 64 inches x 86 inches. Reversible comforter- one side features Optimus Prime & Bumble Bee and the other side has Silver Knight and Grimlock Theme- Transformers 4 Age of Extinction Movie.