I think a lot of people have no idea how much women (especially in shape women) actually weigh. I take part in a sport with weight categories and so I know exactly how much my female friends weigh, both at "normal" weight and competition weight.
I'm 5 foot 7, not quite as lean and strong as OP but overall very similar body type (masculine my arse) and weigh about 63kg
One of my friends (A) is significantly shorter than me (I'm terrible at estimating height so I won't bother) and she weighs about 53 kg and she looks visibly "skinny", even her face has no fat on it. She competed at 8 stone (51 kg) and looked actually quite gaunt and found it very hard to cut down to such a low weight. There is no fucking way that Kim k weighs 8 stone.
Another friend (B) is a little taller than me, maybe 5 foot 9, and has a naturally more "curvy" body type, with what I call "child bearing hips" and a bit more fat on her. (That said, there is a lot of muscle underneath and her body fat percentage is better than the vast majority of the population- I'm just comparing her to very skinny friend A). She weighs 75 kg.
It used to be the case that at pro level there were only 2 weight categories for women in my sport- under 115 pounds (52 kg) and under 135 pounds (61kg). They have only recently added an under 145 pounds (66kg) division.
I was talking to a male friend (who does the same sport) saying that it was good they had added this category so that more women can compete. He said "yeah, but there are very few women who weigh 145 pounds" (I'm going to assume he meant fit, sporty women). I pointed out that I compete at 135 pounds, but I have to diet for it, and that friend B was too heavy to safely compete, even at 145 pounds. He was genuinely SHOCKED at how much we weighed.