I can't help but wonder how heavy that necklace will be once it is made. Thus, I third (or fourth?, Fifth?) the recommendation to have it made into smaller clipable lengths, and also ask to see it once he has 35" or so completed so you get an idea of how it feels, how the chain wraps, etc... sometimes tin cups tend to get wrapped in each other. Having different lengths will allow you to wear them with ease (your neck will thank you), wear a strand as a bracelet, and maybe even as a belt!