There IS a way to figure it out, but it takes a spreadsheet and a lot of brain work. calculating total number of stitches of the original compared to number of skeins used…
Here’s what I would do. I would start by making the handle. That’s going to need to be done no matter what.
According to my quick spreadsheet I setup, you should be able to make it 45st by 34 rows by 70 rows tall w/o any problems. It’ll probably turn out a little bit taller than 70. but you should be safe making it that big.