Tried on only. I tried it on over a Manner Wear diaper after opening the package, but it was clearly too small, so I'm selling it. It's new and unused, but it has been opened, so please refrain from bidding if you are sensitive to this. Size: SS Please check the size chart in the photos. Adjustable P.one brand manner belt, gray and blue design. - Brand: P.one - Color: Gray/Blue - Material: Nylon/Polyester - Design: Adjustable manner belt Thank you for viewing. Product Description (reproduced from the official website) A dedicated outer garment developed to fit your dog's body! For outings, marking, incontinence, caregiving, and illness care. Ideal for manners such as marking, incontinence, and caregiving. Using it with the dedicated manner pad is hygienic and economical. ＜Raw Materials＞ Cotton, polyester, polyurethane ≪How to Use≫ Open the manner holder. (The front side is the one with the longer waistband with the P.one mark.) Set the dedicated manner pad (sold separately) in the center pocket. Adjust to your dog's body shape and fasten the two waistbands on the back. ≪Precautions for Use≫ Always wash by hand. Close the Velcro before washing. Avoid using a tumble dryer. Prolonged exposure to fluorescent lights, lighting, or sunlight may cause discoloration, so please be careful. Be careful that your dog does not bite or eat it. ※ Please use it with the dedicated "P.one Manner Pad Active."