Forgot to mention this before but Real Doll are currently also doing a limited production run of Boy Toy (BT) dolls that are smaller than lifesize. Doesn't say how much they weigh, but safe to assume its less than a standard size doll...
https://secure.realdoll.com/boy-toy-dolls/
My Aimee is based on the Real Doll 2 D Body, which is 5' 6" and 95lb (or 43kg in metric).
https://secure.realdoll.com/female-r...-custom-build/