Help, Please!

On July 6th-8th I'll going to NYC (seeing Mary Poppins, Tarzan and Legally Blonde). I need to know something. I'm planning on getting a window card from each of the shows, "stage-dooring" and getting them signed from their respectful shows. Now, when I fly back to Pittsburgh, will I be allowed to carry them on as my "Personal Item". We're putting everything else we get in NY and all of our clothing, bathroom stuff, etc. in our carry-ons (so we won't have to go through luggage stuff). Are the window cards to big to count as a "personal item"?

Oops! I was just getting a little type-crazy and said "respectful" instead of "respective". Thanks for the correction

How big was you carry-on?

Oh, thanks for that tip! Are disposable razors allowed in carry-ons?

Thanks!