This JWFF custom swing leaf box holds nearly 500 nymphs or dries or small flies as well. These boxes slip into shirt pockets, vest, packs with ease. Light and accessible plus durability. Great little box that will hold a ton of flies. A great box for experienced anglers wanting to really organize stuff, plus a great box for beginners wishing to separate several different kinds of flies- - -dry flies, nymphs, streamers, eggs- - -all in one box. Dimensions are 5.5" long x 3.5" wide x 1.25" thick.