My new pair of shoes?

This is the "pair" of shoes I wore to work on Friday.

When I am sitting at my desk I usually have them slipped off but something felt "weird" when I would walk around. I didn't figure it out (or really look) until almost 5 pm. Can you tell what's wrong?

I was either distracted, tired or too rushed that morning and grabbed one of Jim's and one of my shoes before I ran out the door.

Good grief! His are 3 sizes larger than mine!