I decided that the quickest way to make a Mandalorian leather apron was to cut out the shapes from packing foam and glue some cheap reclaimed leather over them, so I screen-grabbed a picture and loaded it into Freecad to make these stencils.

I've made them all into single pieces in case it transpires that I want to print them some day, but if you are doing what I did, you can save yourself some plastic and time by only printing the ones in the picture.

I spaced these about 7mm (quarter inch) apart and made an apron that's just about 30cm wide for my son.