I&K Hair Doughnuts create the most perfect & voluminous bun. Made from a lightweight nylon mesh, the hair doughnut is quick & easy to use & helps hair appear fuller & perfectly styled. diameter in 17cm Available in L, XL & XXL you can achieve any sized bun. To use, simply style your hair into a ponytail at the height you would like the bun. Put the pony tail through the doughnut & push the doughnut to the base of the ponytail. Section the ponytail over the doughnut & twist sections around tucking the hair underneath until the doughnut is completely covered & no hair is left hanging. Secure with bobby pins or hair grips of your preference. You can then make the doughnut as neat or as messy as you desire!