Size

All mechs, characters, and objects on the battlefield have a size that describes how large they are, in grid spaces, on each side (rounded up to 1 if smaller, so a Size 1/2 and Size 1 character occupy the same space). Size is an abstract measurement – it doesn’t describe a precise height and width in feet, but the space a character controls around them. Humans and the smallest mechs are Size 1/2. Most mechs are Size 1, but some are as large as Size 3.

Typical Sizes
1/2 Humans, some small mechs, extravehicular activity (EVA suits)
1 Standard mechs
2 Tanks, vehicles (APCs, construction vehicles, etc), heavy mechs
3 Siege mechs, large or heavy vehicles
4+ Titanic mechs, shuttlecraft