How are pro boxers so big, yet weight so light?

[Funky_Monk]

I was looking at a picture of Bradley Peterson and they look heavy huge .Probably just hardwork and dedication and there strength and conditioning paying off .World level power man .Check the biceps on these 2 on full screen

Very low body fat and water retention will create good definition.
You can see here though they have very small chest muscles, they carry their weight in their shoulders, backs and arms.
Most are also shorter than they appear or claim.

Edit, They may also warm up, press ups etc to get the muscles full with blood so they look bigger.

[mannyman]

guys like Amir Khan whos around 5'10-5'11 started his career off at 135 now is at 140. and even lamont peterson is pretty big yet weight so light. some guys are just freaks of nature and are just born tall and light (paul williams,thomas hearns at 147). but how do they get like this? do they do weights?is it more plyometrics? myself personally am trying to drop down in weight. im 5'11 and weigh 155. with body fat % around 13-14%. i wanna compete at 141 weight class for golden gloves. just curious to how these pros are able to be that big

On tv they look big because of muscle definition and TV apparently puts weight on you. I've met Amir Kahn in the flesh and can honestly say he isn't that big.