I'm confused and am hoping some kind soul will be able to help me. When I go to look at elastic, I find several different types of elastic. There's non-roll, which does seem reasonably self-explanitory, if it works. But what about braided and knitted and plain old flat elastic. Where should the various types be used? I'm mainly looking for waistbands and ankles for martial arts pants to be made out of soft cotton, silk, or possibly rayon if I can't convince people otherwise.
Also, regarding how to measure elastic--how much difference between waist and elastic length should there be? How much does it change the length of the elastic if it's sewn in? I'm guessing this varies depending upon the type of elastic, but is there a good rule of thumb?
Any help is much appreciated!
Sue