Transformers Optimus Prime Costume Transforming Into Prime Costumes designed and built by Azrael723 -Both measure 10ft in height -Music by Lazer.\rbr\rbrI have had quite a few people ask me just exactly how I get into a 10ft Transformers Optimus Prime costume. I figured I should upload this video and let everyone .\rbr\rbrHalloween 2014 homemade transformer costumes; Optimus Prime, Bumblebee, and Megatron.\rbr\rbr\rbr\rbrThe Autobots Welsh Blokes in Disguise Costume Build for the Red Bull Soapbox Race London 2013! Three short months to create four custom Transformers .