Item specifics: 1.Diameter: 35mm 2.Replacement squeaker for your old toys. 3.It is perfect for repairing plush toys or dolls to squeak again. 4.The noise squeaker inserts make a sound when pressed and also when released. 5.Sew these into a new or old pet, dog, baby, or other plush toys. These squeakers can be used in children\'s plush toys as well.