Effective Design: These chicken glasses/goggles help prevent pecking, pulling, and cannibalism among birds. The pinless peepers are to prevent the chicken from pecking hair, , toes, , eggs and avoid harming other smaller chickens or birds. Large Size: Chicken blinders are Pefect for chicken's weight about more than 4.5lb, more big , capon, big , turkey. In order to prevent infection and being pecked by chickens, chicken glasses are necessary. Middle Size: Pefect for Hen weight 1.1-4.4lb; Rooster weight under 3lb, more big , capon, big , turkey, Red, Alakanas, Isa Brown, Isa Brown, South Australian Black, Ban Rock,Easter egger, Birds Material: Chicken glasses are made of sturdy plastic for long-lasting use and easy cleaning. The included pliers make putting on and removing the peepers quick and simple. Colour:Photo Color Material:plastic Package Contents: 30Pcs x Middle Size Eye mask 30Pcs x Large Size Eye mask 1Pcs x Plier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.