Which type of haircut is defined by shorter layers on top and length at the bottom?

The haircut defined by shorter layers on top and longer lengths at the bottom is best understood through the characteristics of a long layered cut. This style typically features layers that begin higher up on the head, creating volume and dimension at the crown while allowing for longer strands to be maintained at the ends.

In a long layered cut, the longer lengths can give a flowing, more textured appearance, which can enhance movement and shape, making it an attractive option for those looking for a style that combines both length and styling versatility. The layering at the top helps to frame the face and can be tailored to suit various face shapes.

In contrast, a blunt cut features hair that is cut straight across without any layers, resulting in a uniform length, while a bob cut offers a more structured shape, often framing the jawline and generally maintaining similar lengths all around. A shag cut, on the other hand, incorporates a more drastic layering technique throughout the hair, especially around the crown, but it does not specifically emphasize shorter layers on top with longer lengths at the bottom as effectively as a long layered cut does.

Thus, the defining characteristics of a long layered cut align perfectly with the description given in the question.