They only address 'markings, labels, and coatings'. However, here is what more web searching did turn up: ABC/WIBC weight specification for bowling pins used in sanctioned competition is 3 lbs. 6 ozs. minimum to 3 lbs. 10 ozs. maximum.
Jul 26 2001, 3:41 AM
Bill H
Answer has 2 votes
Bill H
Answer has 2 votes.
Some more pin dimensions are: 15 inches maximum circumference at 4.5 inches above the base, 5.25 inches minimum circumference at 10 inches above the base. courtesy of the World Book Encyclopedia.
Jul 27 2001, 3:29 AM
gorillamilk
Answer has 4 votes
Currently Best Answer
gorillamilk
Answer has 4 votes.
Currently voted the best answer.
I found this great diagram. All the measurements one could even need.