Make them in any colors of your choice using worsted weight yarn. Pattern tells you how to make it for any size head and includes a chart to help you with the measurements if you are making it for someone else. Using a bigger hook than specified can help you increase the size of the flower. I prefer keeping the headbands as narrow as possible as it makes the flower stand out. You can use a single flower or a pair of contrasting flowers partly overlapping each other, in the same sizes or in two different sizes. Just experiment with the colors, size and alignment and you can make it look different every time you crochet it.