Do you classify Duran as a Big Lightweight in his Prime

[Panamaniac]

I was just wondering what does size mean in terms of boxing.. guys I'm 5'7'' with 7" wrist and 10.5" ankles, how would you classify me size-wise?

To be classified in terms of boxing, you need to include your weight. Most fighters at your height (wrist/ankle irrelevant) range between feather and welter, depending on their weight. In general, a man at 5'7" is considered - to put it in politically correct terms - below average (5'10").