First I made a pattern out of paper by tracing the pic of the life sized version.
Then I traced the pattern onto some decent quality leather scraps I had left over from a ninja costume that I bought on eBay a few years ago.
Then I flipped the pattern over and did the same for the other half of the fastener.
For the piping around the edge, I was going to wrap some leather around some thin wire, but that was a nightmare to work with so I abandoned that. Instead I used some small, black, circular laces, also from the ninja costume.
And I carefully glued it around the edge. It was very rough looking at first, because of the somewhat visible glue, but I was able to deemphasize it by dry brushing on some flat black though.
Lastly I glued on the tiny buttons, and then glued the whole thing together.
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