I have handcrafted these to ONLY fit the FIRST model of Ruger Blackhawks (Flat Top) and Single Sixes made up until 1962 with the XR3 frame. They are a bit plump and sized for an average to large hand. They are an excellent fit to the frame. They are shown on my 1957 mfg Single-Six. They are $155 shipped to the first "I'll take them". Payment by check, MO, or Paypal "friends". You will be pleased or simply return them for a full refund.