Male...
I believe that male Red Sex Links are light colored and female are Red....
They are a color sexing breed.
If you were looking for a male then condratulations!!
If not then sorry...
Jason
I'm going with male, it's too big for 3 weeks for female for me. I have 5 and 6 week old Golden sexlink pullets out side and they aren't that big, but the 4 week old male does.