My tall rubber boots don't fit my large calves. I am unable to get them up all the way.
Here is a cute idea that may work: https://www.practicallyfunctional.com/diy-lace-rain-boots/?utm_medium=Social&utm_source=Pinterest
Beautiful, thank you so much
Using the above idea, you might be able to cut the back or front of the boots down a few inches and insert a stretchy fabric piece which could be glued to either side of the boot top (sliced area) to provide some additional room.
Could you slit them down the back and maybe add gromets and a ribbon to make it adjustable?
Thick elastic sew inbetween slits cut down the sides