Finches cling right onto the soft but durable nylon bag so you can feed multiple birds at once. Durable mesh finch feeders allow finches to cling and feed, yet discourages other birds from stealing seed. Provides maximum airflow so seeds stay fresh and dry. Refillable, mesh-style finch socks come with a nylon rope hanger. Simply fill feeders with Nyjer Thistle Seed and hang several socks at once with this convenient Thistle Socks 4-pack. When you hang multiple thistle socks, you encourage flocking finches to feed in your yard and you add beautiful color and song to your backyard garden. These are an easy and economical way to attract lovely songbirds and make a great gift. Hold approximately 13 ounces each and measure 3-1/2" x 7-1/2" long.