How to classify similar rectangles into several list

I get hunderds of thousands of rectangles and I want to classify the similar rectangles into a list. Do you have any ideas?

Ho @A.C ,

you could use “GroupByFunction” with “Surface.Area” as the grouping function.

It’s a great idea. But what fuction should I input in the function botton.

Which part did I make a mistake?

Don’t feed Surface.Area anything

I figured it out, thanks for your help.