A chain is 66 feet, and there are 100 links in a chain. My pace, when I'm counting such things in forestry circles, is 13.5 paces. A pace is from a standing position forward one foot, then the other foot, then stopping. A full stride. I doubt they use it now, everything switched over to be based on a 100' engineers tape instead of the 66' chain back in the mid-1970s.

SRS