Browsing on Blue Nile, it seems that every chain is 18". Does anyone know if you're able to request an alteration at the time of purchase and if they charge?
I've just ordered a pendant from them and was given the choice of 16" or 18" and I'm pretty sure I saw a 22" at one point. I got the impression that 16" seemed to be the norm tbh. I'm in the UK though, so I don't know if that makes a difference.