〖New & Unused〗 Collar size: 21cm - 29cm This item is new and unused because it was too big for my dog. 【Neck Size】 The first hole position is approximately 21cm ~ Adjustable in five stages up to a maximum of 29cm ◎ My dogs are twins, so I have two of these items in new condition. If you would like to purchase two at the same time, please comment ♡(^^) I also have dog clothes for sale. Please take a look ♡♡♡ Thank you for a smooth transaction ♫