If you're confused about how to determine whether or not you have wavy or curly hair, pay attention to its coil pattern. Hair blogger and follower of the "curly girl method" Emily Evert wrote that, "Wavy hair is more of an S shape, going from side to side" on her blog, WavyHairCare. 

However, if you want the perspective of industry experts, Allure has an official hair type chart with nine different options for those with wavy to curly hair. When it comes to wavy hair, there are types 2A, 2B, and 2C. Wavy type 2A is typically more fine, easy to straighten, and tends to lack volume. Types 2B and 2C are also wavy, but tend to be thicker, coarser, and more difficult to style. In general, wavy hair tends to be more susceptible to limpness than curly hair, and needs to be washed more as it can be more oily. Byrdie recommended using mousses, gels, and sea salt sprays that'll enhance texture without weighing your hair down.