It fits well and it's cute. The only issue I have with it is that the tail is a little too stiff and can get in the way when you're sitting. It feels like it's packed with foam. Also, the tail is heavy and makes the back sag with the weight, which then makes it pull on the neckline when you're standing up. Not the most comfortable kigurumi.
I'm 6'7 and fairly athletic build (Broad shoulders/ large chest- hmu ladies) and wore it as a Halloween costume. Onesies in my size are hard to find and this one fit exceptionally well. I now just wear it around the house in hopes of making it socially acceptable to wear these on a daily basis.
I’ve worn the standard size red panda kigurumi for Halloween and various events for years now. The sleeves and legs are way too short, though. I recently discovered that there’s an XL version and had to get it. I’m 5’7” and the fit of the XL is so much better. The sleeves and legs are a much better length and the entire kigurumi has that oversized baggy look that the standard size lacked if you were over a certain height. The description of the product recommends the XL for people over 6 feet, but don’t hesitate to order it if you’re 5’7”+. It won’t be too large at all. I’m very happy with this product. I’m excited to wear it to a party this year without showing my ankles and wrists as much.