This is the smallest size I had for sale, but a 2kg petite cat managed to escape. I think it would be suitable for average-sized cats and small dogs. For nail trimming, administering medication, etc. The body is secured by tightening the Velcro straps. I plan to ship via regular mail. If you would like tracking and insurance, I can accommodate you for an additional shipping fee, so please let me know in the comments.