These gloves are just beautiful!
And so feminine, I'm sure your daughter will love them. I would look for a pattern in your daughter's size, at least to work the hand and fingers portion of the gloves. Ravelry has some in smaller sizes that are free, you will need to do a search using the yarn weight that you intend to use. Doing a swatch in the yarn you have chosen in the pattern could also be useful to figure out how many pattern repeats you will need for the section from the wrist to the elbow. This should be pretty simple to work out the math on.