The Planetary Drinking Glass Set is a 10 piece set and includes the Sun, each of our planets and even has Pluto. It puts the solar system in the palm of your hand. It is an ideal gift for Perfect for astronomers or astrologers. The glasses for the 8 planets are identical in size but sun’s a little bigger than the rest, and Pluto’s a little smaller than the rest. The capacity for the 8 planets are 10 oz, for the Sun is 16 oz and for Pluto is 4 oz.