This is a perfect way to use up yarns from your “stash” or leftovers from other projects. You can go right to the end of each ball. There is no particular length required. Nor do you have to keep in the lace pattern order I have given.
You can choose to use all the patterns or just a few….or even just one. You will get to sample various lace patterns, which vary from 4 to 12 row repeats. There is no right or wrong side of the scarf so you can end on any row and side.
I recommend using the same wt of yarn, example; worsted.