Just curious: What determines the size of a guys TESTICLES? *ie BALLS* And how low they hang? Some thoughts: is it heredity, puberty, testosterone level, diet during puberty, type of underwear, other. I'm just curious because I've seen and felt some really HUGE and HEAVY ones lately and I just feel like mine are so small, and don't hang nearly as low as the big and heavy ones. Are there advantages to having BIG balls? to having SMALL balls? Anyone have any information on whats considered big, normal, small with regard to testicle size?