The material is chiffon,very soft and comfortable.It won't hurt your pets' neck. The flowers is about 3'. The back of them have a wide elastic rubber band so that they can be slipped on most size collars and you can remove it to any position of the collar,also easy to put on or take off. Note: There are only 8 different colors flowers as the pictures in a package, no collars. Because of different batches, the colors may have a little difference. But the colors must be very beautiful.Please understand. Thanks in advance. Different colors have different styles, which will give your lovely cat or dog a different visual experience, and they will make your pet look stylish and beautiful or handsome.It can be It's also suit girls or wedding decor.Such as it can be used girl’s headband.Women can wear it on their fingers at wedding.You also can use it to decorate hats, shoes, belts or as brooches.I think it will make you very beautiful. Healthy and Hypoallergenic materials: all the collars flowers are made of healthy, non-toxic and low hypoallergenic material, and will not cause any discomfort to your pet.