Bag of 6. These are "cheapies" of the same style as the OEM fastener and are good for a couple uses before they break. But at least they are better than the ones I got from ebay, some of which broke on the first install. And if you don't expect to take them off more than once or twice what the heck, these should work. Priced accordingly.
If you want a better option see our "Fender Liner Rivet #2". They are a different style fastener but are high quality and work great.