I think we're demonstrating the confusion of terminology I was talking about. For some, such as https://www.supercrossbmx.com/blogs/...alf-link-chain and https://www.sheldonbrown.com/deraile...ent.html#chain a full link of a bicycle chain is 1 inch or 2 pins/rivets/rollers. I still like the way Park Tool counts pins/rivets/rollers when they describe sizing chain.