1/48th scale models are the closest to WH40K. My 40K stuff comes up to about the stomache level of my 1/35 scale guys. Unfortunately I cannot remember the model rail road guage that approximates 40K though. Then again I put a 1/35 scale M113 next to a rhino and it's only slightly bigger with a closer match up than my 1/48th scale merkeva. Hope this helps you man.