some of them have good symmetry...but as for size...I think you'll find that most have a very lowBF%, but, I've never seen them bigger than let's say 190-200lbs at 6 feet, now, that's not bad, especially if your BF% is low, but, I wouldn't say huge
its genetics bro. u have to be 5-7% naturally imo to constantly model. and most of them are about 160 170 tops. usually pretty short too. just eat right and do cycles that give more lean mass. thats all i can say. u have to understand how much they can use lighting and coloring to make those guys look jacked as hell, then u seem some of them and they are tiny. there are some big ones but rare. ive known a couple of abercrombie models, they just lived in my dorm 6 years ago, fucking nerds would leave there photos out so everyone would see them. i only ever saw them doing chest or biceps at the gym. they were each about 5 6 155.
i'm just sayin from experience meeting these guys, 511 185 is like a model for a muscle mag, they are more like bbers who stay real trim, big difference imo. like is said never was impressed by the ones i knew, they could only bench 135 like 10 times. the lighting makes them look bigger, tyrese looks big, he is like 5 6 175 though. its all lighting bro.
there is one dude named scott markey who is a trainer and does muscle ad covers. he is about 220 5% he looks nasty, a frickin v, but he doesnt consider himself a model just a personal trainer. i can't talk abou this anymore, brad pitt used hgh a gram of test and drank a whole bottle of winny everyday. thats how he got up to 240 in troy, bwahahahah. what ever your goals are good luck