Sometimes I like to add posts just for the googlers... I know how it is to search the web over for info and can't find it. I noticed in my analytics today that someone landed on my page from google searching the above subject.
Here's how I do it....
For the length, I measure my DD from just below the collar bone down to the desired length (which for me is the knee), and add 1 1/2" seam allowance for the casing at the top and 1/2" seam allowance for the bottom hem.
For the width, I take the measurement of one of my daughters losely fitting shirts and add 3-5" depending on how puffy I want it to be.
I prefer more a pillowcase style top rather than a dress. They are still adorable and can be easily worn with pants. For that, I add about 3" onto the width of one of her shirts, for a dress I add about 5" to make it nice and full.
Here is the result.... (these are from this spring/summer)
Dress style
Top style

More for the googlers....
An EXCELLENT place to get info for making bows (bow making for dummies) is http://www.hipgirlclips.com/forums/. Awesome. Lots of tutorials on making bows and running a successful hairbow business.
For the googlers.... I was told by a Michael's employee (who had taken all of the cake classes) that she didn't think fondant could be dyed, and she didn't know what should be used to do it either. Here's how it's done- I used the little jar looking wilton dyes from the craft section of Michaels. I dabbed a bit onto the fondant (about 4 dabs). I kneaded and kneaded for like 15 minutes. Finally everything was all one color. Voila. So... use the Wilton jars of color and knead until it's all one color. It takes a while, and you may have to add more to achieve the color you want, but it can be done. I made 








