First of all, I know nothing about this axe (only that it comes from Africa). Could this be Songye or Nsapo-Nsapo ?
It's a big piece, weighing approx. 1 kg. The handle measures 40,5 cm. The iron blade is 26,5 cm long and 25,5 cm wide.
The axe blade was made from 1 piece of metal which was cut, folded and twisted until this design was obtained. Real nice work.