I was having trouble getting my self bindings the right length on some of my knit tees as all the knits had different degrees of stretch. Now I have started cutting a strip that is longer than my neck opening rather than measuring and pinning it around the neck stretching slightly as I go around the curves. If the knit has lots of recovery I pull more as I pin in the front ,shoulders and curves. I mark on the strip when I reach the back neck center of the garment and this is where I make a seam and trim the excess. Then I stitch the band on. On mine I roll to the inside,coverstitch and trim but have also stitched in the ditch and trimmed with success. Since I started doing this I have not had any roll to the outside from being too long or pucker from being too tight so it has been a big help to me. Perhaps this is not the best way but works for me so thought I would share it. Best of all I am not having to figure out with each garment how long to cut the strip and messing up my tee or tank.