I can get you some measurements, but give me a couple of days if that's alright.
There is a HUGE range of sizes, so if possible try to use a softer fabric that will fall nicely even if the doll is a bit smaller than the intended size. Another thing that might be helpful for selling your garments would be to design them so they don't have to be tugged over the doll's head and to make sure metal clasps, zippers and even plastic buttons do NOT touch the vinyl in the back. Other things to be wary of are material choices since darker more vibrant colors in velvets, for example, have been known to stain. So, it might be worth the time to layer the dress over a slip or to even sell a slip seperately or line the dress itself. Another option would be to create cute little leggings or something under the dress to give your garments more individuality.
I don't redress, but that is what I would look for if I did redress. I love smocking and cute embellishments as well such as a sweet lace trim or perhaps cutesy buttons on the bodice or even an under skirt to create a fuller skirt. If I could find a beautiful smocked outfit of my dreams I may be tempted to find a doll to wear it!

I'll get measurements this weekend. If I don't post by Sunday (your time), please PM me to remind me. I have a bunch of stuff I need to do today, have appointments tomorrow and Friday but am free this weekend to do dolly stuff.