I purchased .25 yards of each color: navy, white and silver. I had plenty of white and silver left over, but the navy was almost used up. I also purchased iron on Velcro for closing the back of the top.
This is B's uniform this year, so I was going for something 'similar'.
Using another shirt and skirt outfit that we had, I made these patterns for the cheering outfit. This skirt is a 5.75 X 5.75 inch square (2 pieces of navy). The front of the top is 5.75 inches tall X 6 inches wide. I eyeballed the scoop neck. After fitting it to the doll, however, I had add a little extra to the back of the top on the 'tank strap part' so that it would go over her shoulder. The back of the top will be split and Velcro shut, so the pattern is two pieces of half the front (the green piece in my patterns below).
I decided to start with the skirt because I knew it would be the easiest to make. B's cheering skirt has a silver band around the bottom. So I cut two strips of silver to sew to the bottom.
I sewed the silver and white strips together and sewed it down the side of the front of the top. I also sewed across the top of them, so it didn't gape open.
Now for the back. I cut two pieces of navy and pinned them on,then just sewed the seams halfway up from the bottom (remember not all the way, need to leave room for the arms).
Next I sewed the tops of the sleeves together, forming a tank top.
Then I hemmed the bottom of the top and neckline.
Then I hemmed the back flaps.
I decided to make a simple bow for her hair.
And here is the cheerleader with her doll. I added a megaphone button I found at the craft store to the top.