Usually, I buy those "nonos" in size S chicken that Frimousse Tickle and love !!! Eyes when I gave them the size M, yet they are two small dogs ... I tried other brands a little less expensive but very disappointing because two bones, a chicken without yet delivered in the same packaging and size M matched the S ... I am never disappointed with 8ien1 Dental Delights and the quality is excellent. Do not hesitate, you "doggies" will be + than happy !!!