Details of my hinge for the cigar box.

I get these hinges made by a copper smith in Mauritius, where I used to live.  Here is a picture of the hinge which opens flat.  I have two sizes, the length of the flat piece which screws onto the box is 2 1/2" then the knob then 2 1/2" other flat piece,  for my small cigar box.  The hinge for my larger box is 3 1/2", that too opens flat - it is heavier and the knob and thickness of the copper is larger.