What is the mass or capacity of a hummingbird feeder?

Hummingbird feeders come in a variety of sizes, with capacities ranging from 4 ounces to 32 ounces. The size of the feeder you choose will depend on the number of hummingbirds you expect to attract. If you have a large yard with many hummingbirds, you may want to choose a larger feeder. If you have a small yard or only a few hummingbirds, a smaller feeder will be sufficient.