Ceit --- how interesting to have someone in your profession discuss bones!
I'm another big boned person. When my weight fluctuates, my pelvis stays the same, so I can get flatter, but not much narrower, if that makes sense. My head is even largish --- very common for a singer, and my wrists are too large for many standard bracelets.
I always wanted to be delicate, but I am grateful to be strong. Finding clothing can be difficult, although several costumers in opera have told me I'm one of the easiest to fit -- I have enough size to carry off a heavy, long gown and a easier time projecting a presence from stage. Apparently height, larger frame and high contrast coloring are a blessing on stage, but a blight on film. There goes my movie career!