Backyard Wild Birds Coffee Mugs is a pair of standard 11 oz cups. This set of 2 coffee cups has a Chorus Line of backyard birds rendered by artist Wendy Wegner. Just look at all the wild birds and see have many you can name. Makes a great gift for the birder in your life. You can choose a larger Mug Size of 15 oz (+ $4.00 for two) below if you like. Order a quantity of 2 and to have a set of 4 coffee cups.