TUNERS Animal S Size Purchased June 2024 This is a collar designed to address physical ailments such as hernias, patellar luxation, and joint pain. The lifespan is reportedly about six months to a year and a half, but it seems the effect lasts as long as the lines with the TUNERS transfer remain visible. I used it on a Chihuahua. Perhaps because of the ingredients, the collar feels wide for a Chihuahua-sized dog. It's more like the size for a Dachshund or Shih Tzu. It's quite expensive, so it's recommended for those who want to try it out at a slightly lower price. Retail price is 7480 yen. There are a few minor scratches, but it's in good condition. I will home-clean it before shipping.