Cæsar says on 7/May/07
He's always had the exact same build and oddly enough, a similar face to 5'4 and 1/2 Emilio Estevez. He is not tall, but as someone said below, he is a very attractive man, especially for his age of 44, and I would gladly shrink down to 5'5-5'6 if I could look like him.

X says on 4/Apr/07
Yessssssssss, He was Roger's little brother "Flip" on Happy Days and wore all those half-shirts.

He did appear to be shorter than the Fonzie character.

sf says on 20/Mar/07
On Happy Days, he was clearly shorter than 5'6" and 1/2 Fonzie - I'd say 5'5".

leonari says on 19/Mar/07
X: I agree. But he is at least 5'5"

X says on 19/Mar/07
During his "Days" days, magazines listed him as 5 ft. 4 and sometimes as 5 ft. 4 and a half. During his "Baywatch" days, it was clear that his on-screen girlfriend (portrayed by 5 ft. 6 Erica Eleniak) was at least an inch taller.

IMO, his build puts him closer to 5 ft. 4 than 5 ft. 6.

Gary says on 14/Aug/06
I always figured Billy was not real tall, clear back from his first appearance on Days of our Lives. But at 5'6" or 6'6" he is really good looking