There are two ways:
1. First you choose an outfit consisting of not more than 5 items. Next, you tap on “Edit & Post” in the upper right corner. Now, you'll find yourself in the editing mode which enables you to move your items anywhere you want as well as enlarge and reduce them. In the upper right corner, you'll see a little icon that looks like a t-shirt. Tap on it.
You will then see the popular stickers. Here you can use the search bar and look for various hairstyles such as; short hair, long hair, black hair and so on.
2. You can also find hairstyles that go along with your outfit. Head to the product categories of the “head” area. Besides categories like Sunglasses or Necklaces, you’ll also find one named “Made by combynistas”. Here, you see various hairstyles as well as other accessories for the head area which were made by our community.