Hi there. The thickness of a dread is determined by the section of hair at the scalp. If that area is the size of a quarter, that that is what the mature dread will become. It is recommended that a dread should be no larger than a quarter/1", otherwise they take longer to dry, and will be heavier over the years, causing some tension on the scalp. When people do the twist & rip method, they will not stay the size they first look, as they will loosen, shrink and zig zag up and eventually become the thickness of scalp size. When first starting out, if you need to separate daily, then do so. There is a video on this site on how to do it. It does not take long for hairs to join over in another area, especially when we sleep on it, so keep up the separation, beads help with this. The thickness of a single strand of hair does not determine if your dreads will be thick or thin. Assorted sizes look wonderful and original. and natural.