The circle skirt will stretch in time, but it does take time. I usually hang mine folded over the hanger, so there is less stress on the cloth. Circle skirts stretch because they are cut on the bias. As for your25 yrd skirt it depends on the type of cotton. I have a cotton gauze skirt that streched out but that is do to the weight and the weave of the fabric. If you have a tighter weave you should have less stretch. I also hang this one folded over the hanger. I'm not sure if this is how everybody else does it but I don't perform too often so I have the time to iron out my skirts if I need to.