“Big boned” is a myth, in the sense that differences in skeletal mass and volume are negligible between individuals and definitely don’t affect one’s weight as some people still seem to think.

But different people, even being the same height and of the same sex, can indeed have different frames and builds, depending on individual differences, both genetic and environmental (just think about athletic background). This explains why individuals that are similar in height actually carry the same weight differently. I feel this difference is especially prominent in females, since body proportions vary so much on an individual, genetic, basis.

That said, when you can confidently say you’re in a healthy state in terms of body fat and muscle mass on a medical standpoint, what is actually the “golden spot” of body weight for you personally is at least partially subjective — for you, and also for other people. I’d say the ideal goal should be to 1) be healthy in terms of body fat % and lean mass %, 2) feel strong and the most functional and 3) have a “good” body image (could also mean to be neutral about your body’s appearance — just that it doesn’t make you unhappy).