I got my first zippers from Cork Button Company (FB) - I didn't order that many as I didn't have much material, at the time, and I sort of wanted some testers first.
The colours were exactly what I wanted, and I'm happy with the quality, as well as their prompt shipping, so I can totally recommend them, and will be ordering more zippers soon! =)
Although I've been a member of Etsy since 2011, I've never actually sold anything, but I've put these small handbags up as my first items. They are really small - the bottom width is about six inches, and bag height is about five inches, so they're good for when you only want to grab the basics with you, like when you're going out to walk the dog, do a bit of shopping, etc.. These bags are just enough for keys, small purse, pocket mirror, and a lipstick, for example. Not big enough for a large smartphone, but a smaller phone should be fine.
The fabric is thin 100% cotton.