Balls size isen't a matter for worry , are a lot of porno actor ,of course really many of them with not an extreme large penis but with good girth and small balls , that allow from aft side pic see a long o large penis .
Exactly their balls are apart of their penis girth , and they are porno actor ,that charge money to fuck a girl.
Think you should to worry if you haven't enougf penis girth ( this is easy to resolve by small surgery) , later worry if you have premature ejaculation and later if you haven't a regular penis erection .
And of course if your penis lenght isen't good too , but at least with a good girth ,size penis is matter of only one problem : maximun a couple of inches more , compared with other.
That would mean with small girth , size penis problems duplicate.
So do not worry unless you have one of the problems I mentioned to you .
Even big balls are a problem for sex , unless were rigid balls, in other way they move anywhere and may hurt you .