Size Wondering about exact measurements between grids.

I am putting together a C&C cage for Joseph. I drew out my plan (below) and ordered my materials...the only info I really need is measurements. I know that it may seem a bit extreme, and way to open of a space, but we have plenty of hiding spots and other stuff to make it a lot cozier. Plus, we are looking finding one or two more buddies for Joe, but I need to have the space first before I commit. I know we are going to love it!

I saw the measurements for the coroplast bases when I was ordering, but there is a significant difference between the dimensions of the base and the cage once it is assembled. I had to order the sheets to accomodate such a large cage and was hoping to go ahead and get a plan together for how to cut them once everything arrives to save a bit of time...and give me something to do while I wait (so impatiently) for delivery. I was hoping someone would be able to help me out by telling me the actual inside measurements of 1, 4, and 5 grids.

I'd appreciate any help or advice! Thanks in advance!