Many years ago (30?) I had mine surgically removed because the metatarsal pads were not working and the pain was extreme. It was about the size of a quarter

There’s a place called the feet store, something like that on line, that has many variety of met pad. I have a different problem now (fat pads in feet gone, migrated to stomach) so my podiatrist made my orthotics with the met pads in them. What a difference! When I don’t wear the orthotics I will put a met pad on my foot. Tons of options.
Good luck.