This is a size M dog outfit. I'm selling it because the size didn't fit. I bought it online, so I couldn't return or exchange it. My dog usually wears size M and weighs 3.3kg, but this outfit doesn't stretch, and it took a long time to get his arms through, so he didn't want to wear it. I think it might fit a dog that wears a size smaller, but it depends on the dog's build, so I won't accept any complaints about the size not fitting. Please consider carefully before purchasing. The fourth image is the size chart posted on the website where I bought it. The muffler is size S. Please check the length in the seventh image (quoted from the website where I bought it). I'm also selling this because the length wasn't enough, and it looked uncomfortable. I bought the outfit for 2,375 yen and the muffler for 1,520 yen. It's in good condition, but I put it on my dog for a trial, so I'll list it as "Like New."