After looking at the base size list I'm curious about O&G Spearchukka's and Rock Lobbers. I know that they don't need to be put on a base, but if you can, what would be the recommended base size? I can maybe see Spearchukka's being on 40mm squares.
I put my Rock Lobbas on 50x100s. The 6th ed orc model hangs over a tiny bit. If I was going to do it again I would use 60x100 bases.
Spearchukka's fit perfectly on 40mm bases. That's what I use.