Need some shrinking help (avatar) and color help

[browneyes]

I have an avatar I want to use, but it's too big. Can someone tell me how to shrink it to fit? And it's got blue eyes, can you tell me how to change the eyes to brown (dark brown, if possible)? He's the image I want to use:

Thanks, in advance.

 

[browneyes]

Thanks Beth. I love it!!