I`m a 9D semi dress Whites, and Bounty Hunter, and I fit into the 8 1/2 in the James above, and a 9 in the Williams above from Nick. I guess not only do Whites and Nicks have different lasts, but one may have different sizes between them. Always good to get a professional opinion. It was generally said here that Nicks sizes large (9 Whites would be 8 1/2 Nicks), but its nit generally true I feel. The 9D Semi dress Whites, and my 9D William feel about the same.