Size:9.5cm/3.74 inch TPR Rubber-Preparation of non-toxic colorful soft rubber Aims to exercise, strengthen and clean their teeth, meet their various needs of biting and prevent bad tearing habit anywhere Delivery Time:It usually take about 7-17 business days after it ship. There is only one option for Amazon - '17-28 days'. So you will find the Estimated Delivery Date too long. In fact it is not ture. Most of our customers receive their package in 7 - 10 business days. 100% money back or replacement if you are not satiesfied with the quality.There is a size table in the left picture.