Actually I just pulled a long strip out of my box to make some wicks and it doesn't say 500ft (not sure why I thought that) it only has weight, which is 3 or 3.5 lbs (it was yesterday and cant remember if it was 3 or 3.5 pounds. So I dont know if that's a big box or not, but it did come with a big plastic bag insideYou are probably good for a decade or more, even if you give away some to friends! My 40ft box has lasted somewhere between 2 and 3 years and still has more than enough to see 2020 hit in January.
I get about 2 or 3 wicks from a piece of the coil about 2 1/2" long after splitting it lengthwise.