IMHO on the size-If you want it to go on a bed (possibly) I would go with a queen. Even if she has a double bed now, if they ever up-size to a queen it would still fit nicely. I have a queen/king size quilt on a king bed and it is a bit small. Wish the quilt was larger. Our guest bed is a queen and it fits 2 people shoulder to shoulder. Seems pretty tight after having a king! :wink:
Love the plan you have! Hope you will post pictures! :lol: