Length: 285mm
Diameter: 48mm
Weight: 558gram
Filling: 113gram TNT or Pentolite.

The photos below show two versions who only differ in paint scheme.
Early types were yellow, later in the war this was changed to olive drab.
Photos © Lt. Len.

The sectioned grenade on the right clearly shows the liner, charge and fuze mechanism.

The british army adopted this rifle grenade as well, but with a different fuze mechanism.