I wish I could tell you how much is on this spool of shiny silver thread. The spool itself is about 3 inches long. I've never seen a spool such as this and have no idea how old it is. The thread is strong. The cut end is interesting....the thread itself is many very thin pieces of metallic silver fibers that are "woven" and twisted to make the thread. Looks like 10-12 thin threads, maybe more, that are woven to make a single (and probably pretty strong) thread. There's no way I'm going to unwind the spool and measure how many yards are on there, but I'll bet there's 10, 12 or more yards on it.