Shopping in Iceland is pretty expensive, but there was a Tiger store there which I read about in a magazine. It is a Danish retail concept and supposedly the most expensive thing in the store costs
20 euros. It didn't disappoint. I bought a lot of cool stuff like these plastic envelope templates. Nice, in this case, to use when you want to wrap a gift certificate a little bit more funky than in a normal white envelope. The paper was also bought in the same store (I just found out that in the Netherlands the stores go under the name Flying Tiger).