Particularly great for small breed dogs, our new "hands free carrier" allows you to take your pup along on walks or rides, while leaving your hands free for other things. What a great opportunity for close bonding with your pet. The small size is for pets up to 10 lbs with the following dimensions: 8"W X 12"H X 8"D. The medium size is for pets up to 10 lbs, with the dimensions: 10"W X 15"H X 10"D.