Dear [Aunt's name],
I hope this letter finds you well. I am writing to ask you for a Christmas gift. I know you are very busy, but I would appreciate it if you could get me something.
I have been thinking about what I want for a long time, and I have finally decided. I would like a [gift name]. I have always wanted one, and I think it would be the perfect Christmas gift.
I know you are probably wondering why I want this gift. Well, for one thing, it is something that I have always wanted. But more importantly, it is something that I will use and enjoy for many years to come.
I know that you are not always able to get me everything I want, but I would appreciate it if you could get me this gift. It would mean the world to me.
Thank you for your time and consideration. I hope you have a merry Christmas!
Love, [Your name]