Thats a Silver-Spangled Hamburg. The Hamburg is a nice hardy breed of chicken, and I'm sure you'll like him (yes, I think that it is a he, as he seems to have a slightly red comb, and most "free" chicks are roosters).
From the.moment we received him, i described him as "small in stature, big in personality" and that exactly how everything I'm reading describes them too. Thank you!!