It's not quite etnographic, but I also like small (pen)knives.
Here are the two smallest pieces of my penknife collection.
The 'card'knife measures 3 x 2,7 cm, with two blades of about 2,5 cm long.
The other one is a more 'spanish' looking knife with a lenght (closed) of 3,3 cm and a blade of 2,5 cm. The handle is made of horn.
And...yes, they do cut !
