Can you be skinny if you're big boned?

Not really. Bone weight depends on how much a person”s entire body weighs. Bones make up around 15% of a person”s total body weight. While people do have different frame size, most who weigh too much for their height do so because of excess body fat.

Why do I have thick bones?

Bone density (the thickness of our bones) relies on a good diet, sunlight and physical activity to keep them strong. ... Bone density will be heavier on a person who is overweight as they are carrying a load, this can mean that the lower body can have good bone density while the upper body may have thinner bones.