SCTV's "What's My Shoe Size"
I never understood this skit when I was younger. After watching a bunch of "What's My Line?" shows - I think it's hilarious! John Candy writing his name really, really small on the chalkboard! Catherine O'Hara as a truly weird Dorothy. And Dave Thomas' Bennet Cerf is perfect. Well done SCTV. Well done.
https://www.youtube.com/watch?v=RxbfYiiBuP0