In my case it didn't matter....was just that he didn't carry 2x2's because they weren't really wanted and they were usually warped. I saw the same in larger lumber yards and big box stores.
He bought really nice 2x4's and was happy to rip them for me.
If I was going to rip 2x4's for use with...
Except that a 2x4 ripped is actually 1 1/2" x 1 3/4".
Thinks the 2x2's you buy as is are 1 1/2" x 1 1/2"?
Might not fit correctly into the EZ frame sockets?
I used to have a great lumber yard/man who would rip 2x4's for me,
built a lot of stuff from them.