How can I make a bag out of old jeans?

https://www.hometalk.com/diy/decorate/rooms/jean-bag-10059196

check out sewing sites online or just open side seams and design to your size & taste, as if you were going to make a skirt out of them

Take a look at some of the bags on Pinterest, cute! https://www.pinterest.com/search/pins/?q=bag%20from%20jeans&rs=rs&eq=&etslf=1952&term_meta[]=bag%7Crecentsearch%7Cundefined&term_meta[]=from%7Crecentsearch%7Cundefined&term_meta[]=jeans%7Crecentsearch%7Cundefined

I actually have some cut up jeans I'm planning to do this with. I'm keeping the seat and front zipper intact. I plan to sew across the bottom so that the zipper can still be used and make straps from the legs.

Several ways one: cut the legs off and use a seam ripper to open up the crotch . Then sew the bottom cut a strip from one of the legs to make the shoulder strap. Another is to cut the legs off sew one end now you have a bag to collect plastic bags in. Or cut the legs off open them up and sew them together leaving the pockets on as extra storage.

Have you Googled? Hundreds of options out there, here are a couple! Have fun!

https://www.pinterest.com/pin/166773992431013090/

https://betweennapsontheporch.net/25-denim-bags-purses-made-from-recycled-jeans/