By unit of length and distance and conversion ,we can say that
1 cm =10 mm
11 mm =1.1 cm
11mm x 11mm = 121 mm2
11mm=1.1cm
Yes, 11mm is smaller.
11mm
1.1
no
As long as it has an 11mm ring mount then Yes. And I think it does, or you can order 11mm scope rings for the scope.
1.1cm
0.011 metres
Yes.
42mm
The volume is 2211.7mm3