I agree with what Paulp said and asks. Otherwise, I recommend a 26" but a 28" will do fine. I would recommend spending the extramoney for a newone with Rem Chokes. I've seen them priced anywhere from $136 at Guns Unlimited in Omaha, NE, to $189 at Scheels. I recently replaced the fixed full choke 28" on my 1100 with a 26" Rem Choked.