This blanket is definitely large enough for an adult to cuddle up into. I'm very short (5'1), so maybe I'm not the best person to ask, but when my feet and legs are all the way into the blanket, I can pull the top part of the blanket up to my chin. The fin isn't quite as big as pictured, but the entire blanket still looks adorable, and other than that, it is exactly as pictured and described. Apart from the fin, if any reviewers say it didn't come as pictured, then that person simply didn't read about the blanket before buying it, because it's just as described. The feet are open in the back, so you can stick your feet out if you want. Otherwise, you can just cuddle your feet into the fin. Also, the back is open at the top of the tail, so that you can drape the top part of the blanket over you, but the bottom half of the tail closes around your legs completely for a nice snuggle. :) I can't decide if I'd rather have the top part of the tail open or closed around me. Either way, this is the best blanket to snuggle up into. It is super soft, comfy, and cute. I love the extra colors on top of the green, which make this blanket extra beautiful. It seems very well-made and good quality, although it is fragile, so be careful letting your pets around it if they have claws like my Beagle does. My mom loved this as her birthday gift. At first I thought it was silly, but she asked for it, so that's what I got her, and after I received it in the mail, I realized how soft and comfy it is, so I ended up snuggling into this blanket the day I gave it to my mom. She said she didn't mind! I'm very pleased with this purchase, especially considering it's only $11-14 (depending on which color you get). I ended up buying one for myself after seeing how awesome the first one was, and I love mine just as much as my mom's! I posted a picture of me in it on Facebook, and my friends & family got a kick out of it. A friend told me she's going to buy one for herself today. I can't say enough about how amazing this blanket is! You'll be missing out if you don't buy one.