I got two. A Zenitsu medium for one dog and Tanjiro Large for the other one. The small dog got the medium and it fits him perfectly he looks so cute. I love the material its so nice!The only problem is the Large size. The Dog is a medium he’s a cockapoo/something else I cant remember lol. But he’s not a big dog., he does need grooming so well take him and see if after that the costume fits him. Might use it as a cape for him If not then I’ll definitely be returning. So please size up! :) so your pup can be rocking that Demon Slayer costume and also be comfy.I got a medium and it fit my 8 pound shih tzu quite nicely. I’m also really glad it came in the next day after I ordered it in case the sizing was off and I needed to return it. The costume is a little loose on my shih tzu which is good because she is quite comfortable in it.Great fit, it stretches a lil to make it easy to put it on your dog. O bought the large size for my medium dog of 20lbs. The material feels good, not cheap. Great value for 16 dollarsAdorable little Tanjiro costume. Looks good on my Shiba, but he is 28 lbs and the largest size is a little small on him. The material is nice and stretchy so it's not an issue, but there really needs to be larger sizes. I feel like this is a Large based off of toy breeds or cats...Not right sizes and too smallmy dog got fat so i put it on my cat insteadVery cute, and nice quality. Sizing runs small though. My dog wears between a medium-large, so I sized up to a large. It barely fit her because it’s sized too small.The pattern and quality of the clothes are perfect! The only problem is that I ordered a medium and it did not fit my American Cocker Spaniel. She usually fits a medium in all other clothes from petsmart, pecto etcétera. I am left to believe the size of the clothing is not completely accurate.Le queda perfecto a mi perrito!