Grpet Pet Backpack Snacks Carrying Bag for Small Medium Dog Puppy with Leash S M L S: backpack is approx.12*14cm, for the chest measurement of 30-42cm, for dogs less than 4KG(Minlature Pinscher, Chihuahua,2-4 months' Toy poodle, 2-4 months' Cocker Spaniel) M: backpack is approx.14*18cm, for the chest measurement of 36-54cm, for dogs of 4-7KG(Maltese,West Highland Terrier,4-6 months' Toy poodle, 3-4 months' Cocker Spaniel) L: backpack is approx.16*20cm, for the chest measurement of 42-60cm, for dogs of 7-10KG(Pug, Mini Schnauzer, 5-6 months' Cocker Spaniel) Size of the leash:1.5x120cm Material: Oxford and mesh