I'm leaning towards making mine as I want a aqua and lavender one. I will wear running shorts under it but will tryon before I leave ohio.I made a no sew one (the knotted kind) and it turned out great. My suggestion--make it as full as you can get it. When you run/walk they tend to separate a little bit. Also make sure you try it out before the race, just to make sure nothing is scratchy in the wrong places.
Will try ebay and hope I don't get sidetracked like I usually do.I just bought my tutu on eBay for $12, free shipping. They had every color you could think of. I got black then am adding a neon green bow to the front for the Tinkerbell half. I was going to make my own, but this was just so cheap and cute, it arrived 5 days after I got it. In the search engine on eBay type in adult tutu. There are tons of them.