My x & y axis read two sizes. Can anyone help.

I have NO IDEA how I screwed this up but I would appreciate it if someone would help out.
The problem is that when I would create a plane, it would read that it is 2 feet by two feet. Now it reads that it’s 2 feet by 8.936 inches (even though it’s a perfect square). The measurements on my Y axis are all screwed up. HELP!

Try “Clear Scale” or Alt S key.