A simple model of a chain/necklace. 

Probably helps to use a gluestick/majigoo/nano polymer adhesive and dry filament. I used mostly default settings, .20 layer height, no brim, no supports

Small enough to fit on most build plates but long enough to go around your head and neck. If you're clever you could attach a pendant of some sort right on the build plate and have it print along with the chain. (simple example included)

I also added rescue link that you can use for a failed print or to make the chain smaller.