The hourglass figure to start (though I like bigger women). The ratio of 7 to 10 based on the midsection of the woman compared to her hips.
It’s easier for the male to spot a female if she has an hourglass figure. The smaller the ratio (5 to 10) even though it isn’t found in nature, the more attractive the typical guy would rate her.
Symmetry has a lot to do with attractiveness as well. She has a higher pitched voice showing elevated estrogen levels. Her skin has a shine to it and appears smoother. She may even have a scent when she’s ovulating that the guy might not know he’s picking up.