This Finnish stickgrenade was meant for training.
It was fitted with a blackpowder spotting charge to imitate detonation.
These grenades were re-used after training by replacing the fuze mechanism.

Length of head : 100mm
Diameter : 53mm
Diameter measured over carrying clip : 60mm

The carrying clip is attached to the head by three screws.

Photo right © Markus
Photos below © Brian