Odor-blocking poop bags for medium-sized dogs, 15 bags x 4 rolls. - Size: S (20cm x 30cm) - Quantity: 15 bags per roll - Intended for: Medium-sized dogs - Features: Odor-blocking function They really don't smell! The blue bags are opaque, making them easy to use. Although they are for medium-sized dogs, they are not that large, so they can of course be used for small dogs as well.