These Socks are woven from heavy material and are approximately 4" x 22". These are not the cheap department store thistle socks. They provide an economical method for feeding small desirable birds that cling, such as Goldfinchs, Siskins, Redpolls and House Flinches. The birds have to work to obtain the seed. Draw string retainer protects from spillage of expensive nyjer seed. This sock will accommodate approximately 12-15 birds at a time. $6.5