Scales are based on a replicas size in relation to its real world counterpart. This tutorial is not meant to be taken as an exact guide to what anyone can or should build; it is only meant to give a rough outline on scale in relation to main line figures. My hope for this body of work is to offer a helpful frame of reference for most customizers looking to work with model kits in creating new Transformers figures. * * * * * 1/25 Scale Semi Trucks Seen here is the MP-01 mold in relation to a 1/25 Paystar cement truck. The sizes are an exact match, but this wouldn't work very well as a direct re-shell. It would be best to incorporate the parts. Also seen is 07 movie Optimus Prime which is slightly smaller, but could also work given some great ideas and balls to start cutting. The Masterpiece Seeker and Grimlock could also donate parts or combinations, but as stand-alone re-shells are unlikely to work.