Never used, still in the original box Maxine One - medium - details about size in the photos. The Maxine One medium dog carrier includes rigid construction that is specifically designed to keep you and your Chonk’s back straighter. Tubular grab handles on all four sides so you can load-in and load-out with ease. There is even a Tail Port so you can let your fur flag fly! Soft reinforced neck collar, with reflective detail, attaches to your dog’s neck collar. It is made out of elastane to protect your dog’s neck movements.