Outward Hound dog nylon backpack size Large, blue, only used a few times. Saddleback style backpack, adjustable ergonomic fit Removable pack takes weight off dog during rest stops Convenient pockets for carrying food and water, interior mesh pockets measures approx 16" long and 24" wide Please refer to manufacturer for size chart, but this pack fits both my dogs (shep mix, hound mix) who each weigh 55-60 lbs.