My 6 foot friend gave me a pair of jeans with a hole in the butt. I used the entire pair with just a handful of scraps left.
Most of the sewing was done by machine, as shown in this picture:
The main exception was sewing the bib to the original pants waistband because I wanted to be able to use the belt loops for hooking tools to, and use the button/buttonhole flap for tying the harvest apron drawstring to.
My "pattern" was all the great ideas/pictures in this
thread,
https://permies.com/t/40/154065/sewing/Sew-apron#1859505 where you can read more of my process of designing and building this apron (and see more pictures)
Here's the finished apron, although there are plans to add a nice red pocket to the bib to add a bit of colour. Since I want embroider it a little to make it cheery, it will be sewn on at a later date. I've been testing this apron, with adaptations as I went along, for the last week and am finding it very practical for animal care. I often find that in the field I need a place to put one more thing, and this apron, particularly the two oversize pockets, has proven its worth.