Super Soft Ombré Sweater

This is a light sweater. Really soft. A darkish blue on the top and transitions to white at the bottom. I don’t know what material it is made out of because there is no tags or labels. I also do not know the correct size. Never worn. If I had to guess the size it would be a Medium. My mom gave this to me so I have no idea what brand it is either. 🙃