What everyone else has said PLUS if you want to save some money, buy a bag of maribou feathers from JoAnn Fabrics, Micheals, Hobby Lobby, or some such art or sewing store. Strip the feathers from the vanes and you'll have, to use Archer 1's words, a gazillion of them for about a buck and a half. More colors to choose from too. Like Dan, I trim mine too, but I do it after I glue them on. Also, we have shop around here that puts them in front of the fletching rather than between the fletching and the nock. Personally, I think they show up better on the end of the shaft, but there's another option you want to try.