Does it matter? “There’s so many different variations. You could have a very short bob; you could have one with many interior layers,” says Heitkotter. “For a more lived-in feel ...

Whether you like short, medium, or long hair ... This hairstyle can be worn up, down, curly, straight, or wavy. A layered bob ...

Textured, medium-length waves benefit from subtle, barely-there layers, as demonstrated by Chrissy Teigen. Meanwhile, her hair flip adds a boost of volume while emphasizing the ease of this style.