This is a pet bottle holder for 450-600ml bottles. (The pet bottle in the photo is 500ml) Strap length: Approximately 18cm I added beads and made it so you can cinch it up ✨ You can attach it to your bag or use it as a smartphone holder ◎ This is a handmade item, so it is not a perfect product. Please understand this before purchasing. #handmade #knitting #smartphoneholder #petbottleholder