Average size of a high school safety?
Free Safety: 5'10-6'2 170-185 Lbs
Strong Safety: 5'10-6'3 190-210 Lbs
Strong Safeties need to be a little bit bigger because they're closer to the line of scrimmage. And will be taking on blocks from pulling guards and tackles.
I played Strong Safety in 2011 and went 1st team all conference. I'm 6'2 185 Lbs