This video explores yet another method of taking in your jeans waist "Tailor your Oversize Jeans" video. You may have already seen this video a while back. It was my first jeans waist alteration tutorial which I posted last year then took down 2 months ago for a minor revision.
I used a size 16 needle with Tex 60 polyester thread, nylon is also great! My machine is an old industrial Tacsew. I have linked some domestic machine suggestions below.