[HoneyBadger]

If it were up to me, sizes in the game would range from 1 to 12, and combat squares would hold 64 spaces. The sizes themselves wouldn't correspond exactly to their numerical order-while size 1 would equal 1 space, size 12 wouldn't equal 12 spaces on a square. Instead, they'd have these values:

(Size)=(Spaces occupied).
1=1 (dragonfly, Aboleth Polyp.)
2=2 (hoburg, goblin, imp)
3=3 (human sized)
4=4 (shambler, troll, Warhammer ogre)
5=6 (Jotun, unridden horse, shark, Living Pillar, giant eagle)
6=8 (heavy calvalry, unridden moose, unridden drake)
7=12 (Niefel sized, moose + troll rider)
8=16 (Basalt King, Cyclops)
9=24 (monster fish, Aboleth, Titan)
10=36 (elephant, mammoth, earth mother, Aboleth Mind-lord)
11=48 (Dagon, Baluchitherium, Colossal Fetish, Ziz, dragon)
12=64 (filling an entire square: Ancient Kraken, Sphinx, Asp turtle, whale, larger dinosaurs)