Pulleys overlapping?

My son's WP pulley is at his house. I've got his crank pulley. I can tell you that 7" is way too big for the WP. As I recall it's under 6". I'll see if I can get it from him tonight. I've got the AC pulleys on my 440 so that doesn't help.
This is my crank pulley. Its 7.5 inches