This listing is for a set of 4 stickers (Mei, D.va, Zarya and Junkrat) or you can select an individual sticker if you prefer! Each sticker is around 2" x 2". Stickers vary but that's around about what they all are, of course things like D.va's hair means she's larger in height and Mei's wider because of her hair pin etc.
As you can see in the pictures, the brown hair of D.va and Mei have not printed as perfectly as I would like. Therefore this set is cheaper than it should probably be and D.va and Mei's individual stickers are cheaper.
Check out my other listings for more gaming stickers (I also have a Roadhog fanart sticker up!)