I always mail the small things like this at the Post Office. They are almost always the least expensive, especially if you are not looking at an expedited delivery.
Being in the Logistics field (though I am not shipping personal items). I would go to the closest UPS store. I believe some of the Staples locations have UPS/FedEx ship stations. Have them walk you through it. There could be customs regulations that need to be followed. Get the insurance. Usually cheap and worth the price if it's something of montetary value you're shipping.
