So, if I want to order nametags from a 3rd party supplier, I should go with 3 inch wide by 1 inch tall nametag? Just what size are they?

I ordered our nametags from quartermasterstore.com.

They are 1X3. Ordered one fro my spouse, decided to order myself one (and him another, because he loses things like that constantly), and then almost everyone else in our leadership group decided they wanted them as well! Less than 3 weeks turn-around (I cannot remember the exact timing, but it was fairly quick over the holiday season). We got the "custom alder tags" because I like the wood grain; we have the Cub scout symbol on there, and with magnetic backing (instead of a pin).