Length 23 , diameter 2.5 , capacity 1.5pounds,8 ports. Aluminum perches can not be chewed. Openings for nyjer seed are designed to dispense seed economically. Top assembly easily removed for cleaning. Seeds ports are designed to keep seed within reach. The metal parts are squirrel resistant. The weight and design of the metal cap makes it difficult for predators to lift. The feeder can be hung or pole mounted.Size is 23 Inch. Dimensions are 26.5 X 5.5 X 5.5 UPC Code = 021964410636