We have a vintage large wood handle flat head screwdriver.  It measures about 10 1/4" from one side to the other with the wood handle measuring about 4 1/4" and the metal lower portion down to the flat head of the 3/8" end metal portion being about 6".  There is wear and a bit of white ?paint on the wood handle and rust peaking through all throughout the metal.

Screwdriver Vintage Large Wood Handle