There is lots of info on the web if you search under "Huddersfield Ben weigh*" :
huddersfield ben weigh* - Google Search
Most sources say that the "original" Yorkie, Huddersfield Ben, weighed around 30 lbs, but that the size of Yorkies have been bred down over the years.
From FiestaBiewers.com:
"In 1865, Huddersfield Ben was entered the world. His owner, M.A. Foster, popularized the breed in England. M.A. Foster demonstrated that Huddersfield Ben was very successful in the rat killing contests (these were quite popular in the 19th century), and he won more than 70 prizes as a show dog as well.
In 1872, the Yorkshire Terrier was introduced into the United States, and was recognized by the AKC in 1878. However it wasn’t until the 1930’s that the Yorkshire Terrier took on its modern look. Interestingly, the Yorkshire Terrier, up until the 1930’s, weighed approximately 30 pounds, not the 3 to 7 pounds it does today. "
Just the fact that today's breed standard specifies "not over 7 pounds" tells us that some will weigh more than 7 pounds, or there would be no need to specify that in the standard.
My girl is 11 lbs, and she's still small to me. She's strong, lean, and sturdy!