This flower will dress up your dog's collar and is hand-crocheted using a soft 100% cotton yarn and may be machine washed on gentle in cold water. Should be laid flat to dry to prevent shrinkage. Approximately three inches in diameter, the flower slips over the collar through the loop on the back. The center of the flower is open, and the dog collar will show through the center of the flower. Designed to fit a one-inch collar, it can also be used on 3/4 inch collars as the pressure of the collar on the dog's neck will hold the flower in place. If you have special colors you would like used, this yarn comes in many colors. Just let me know.