Here is a picture of three of my BSA Improved Mod D Air Rifles all now over 100 years old. They are from top to bottom 1911 Ordinary Pattern (full sized),1912 Light Pattern (mid sized) for ladies and a 1911 Junior Pattern for youths.

I still shoot the full size air rifle quite a lot but more regularly use a 1912 Light Pattern which I have fitted with a BSA No 8 Aperture Sight to compensate for my gradually worsening (age related) eye sight.
Regards
Brian