It's funny how Martin's height keeps shifting but according to the medical examiner's report Martin was 5'11 and weighed a 158 lbs.

Snopes

They cover the pic thing too.

Dave, Martin was just barely 17 when he ran away from an armed Zimmerman that he told his friend that he was afraid off. He wasn't doing anything wrong and we only have Zimmerman's word about how the fight started. Zimmerman was found not guilty beyond a reasonable doubt but that hardly makes his version of how the fight started true.

Fair play!