If you are unsure, we are only an email or phone call away! There are two sizes of dog car travel solutions to choose from: - The Travel Dog Pod - The XL Pet Pod The Travel Dog Pod is suitable for use as a bed and car seat for dogs no larger than 16kg.  If it is only going to be used as a car seat, then you could fit a slightly larger dog in there, but as a bed, they will likely need more legroom. For example, a Staffordshire Bull Terrier or Female whippet or a Golden Doodle would all be great examples of pups who use our pods in the car. However, for a permanent bed, they may want the XL Pet Pod. The XL Pet Pod is suitable for dogs up to 50 kg If you have questions about the suitability of our dog car travel accessories, contact us by email at info@lutherbennett.com We will be more than happy to find the product that best suits your pets needs!