Since I love batiks, I just buy what I like. There are really lines like in regular cotton fabric. For other cottons, I rarely use all of a fabric line. Even with a quilt that I just finished, the majority was the Nature's Christmas by Moda, but I also threw in some Stonehenge fabric for the sashing and binding because none of the fabrics in the line were going to work well for a definitive sashing. I used the Stonehenge for the binding as well because it made it look like an extension of the sashing (there are no borders on this quilt).