Different is better than best.

IF eleven inches is the best size for a some kind of working terrier, . . .

(I'm guessing, not my breed and I don't hunt - and I think they use chest girth, not wither height - but I need a number to use as an example)

. . . then the working terriermen are going to breed 11 inch dogs.

So how are we going to display that our show dogs are not like those dogs who work?

I will breed terriers over 12 inches, and you my show friend can breed the ones under 10 inches - that way, no one will mistake our dogs for working dogs.

Did anyone ever put this into words for terriers? I don't know, but I do know (for other traits, not size) this type of separation was said to be a factor in show Border Collies or Aussies.