1" from ruins math help

Hello, I was hoping to have someone help me out a bit on what size models can fit into the corner of a ruin that an enemy has put a model 1" from both walls. Does it still lock out a 32mm base? I assume yes, but I was hoping to find the math, as my calculations don't seem to be making good sense for me.

Additionally how spaced apart can I put my models 1" away from a wall to prevent a 32mm model from squeezing between that gap? I'm certain that doing 2" coherency would leave gaps for enemy models to fit into.

I'm generally hoping to figure the math out for 32mm and 40mm bases.