Decoding the sizes of tire chains for small tractors

How do these tire sizes, used to choose tire chains at for example Gempler’s or Amazon, work?

My tractor has 4.5-10 front tires and 7.00-16 rear. I am guessing these are the inch dimensions of the steel wheel the tire goes on, width-diameter.

I don’t find any chains that look exactly like these. Here are three options that have the closest looking numbers I found, but I don’t know if I’m on the right track:

Option 1:
7.50-16LT, 9.50-16.5LT, LT245/75R16, 7.50R-16LT, 275/60R15, LT235/85R16

Option 2:
25x8.5-14, 27x8.50-15

Option 3:
8.3x24

It looks like they list several similar sizes for one chain, and it also looks like there are different kinds of numbers. None of these wheels are 235 inches in diameter. Moreover, there’s that LT in some of them.

What’s it all mean?
Thanks!