When viewed from behind, the glutes form a perfect circle. The mass is evenly distributed from the top to the bottom. This is the most classic "hot" shape. Why it is HOT: It creates an hourglass illusion even without a tiny waist. It looks plump and youthful. Celebrity Example: Classic Kim Kardashian (early 2010s).

Let me know which direction you need, or clarify the original source/text you're referring to.