Sharp'inun twist drills

So called hardware stores generally don't know what a numbered or lettered size drill IS. "Whut?"
I've been getting this from the supply houses as well the last couple of years -a #25 ? whuts that ? I don't think we sell those , my reply is get so and so on the effing phone because you do sell those and he knows where they are . Sometimes I'm right and sometimes I have to wait a day or two for him to get em !