I purchased these on February 1st and tried them on my dog indoors once, but he absolutely hates them, so I'm selling them without ever actually using them! Therefore, they are almost brand new! ◯ Size: #4 (Paw width 6cm) for 15-20 kg dogs See photo 13. ※ Reference: My dog is 16.5kg. The size itself was a perfect fit. ◯ Purchase Price: 1,990 yen 〈The following is the description from the website where I purchased them〉 BECRWOM Waterproof Dog Boots, Non-Slip Shoes, Embroidered Design, Reflective Straps, Suitable for Rainy, Snowy, and Muddy Conditions, Outdoor Walking Shoes for Small to Medium Dogs (Black, #4 (Paw width 6cm) for 15-20 kg dogs) ※ Photos 7 through 13 are screenshots from the website where I purchased them!