i take a 9 1/2 wide shoe. should i get small/med or lge/xlarge copper fit compression socks?

Lg /xlg they are tight. I ordered the socks for my mother’s swelling feet. They do the job but don’t expect comfort. She’s 90and has to have someone put them on her. She can take them off Hope this helps.

Im a 5ft tall female with 7.5 foot and my calfs are at the thickest 20inches. Think these would stretch enough?

I am a 7.5 wide and they fit great. I cannot however answer the wide calf question. I feel like I have an “athletic calf” from my days as a ballet dancer. They fit me perfectly but I do know that Tommie Copper makes a wide calf option. For the price, I would try these

No not 29-30mmHg. Probably close to 15mmHg. Very comfortable and easy to put on. Nice socks but not medical grade pressure. Socks that are 20-30mmHg will always have it listed on the box as at that pressure level it is considered medical grade and when buying in person, you would usually need a doctor's prescription to obtain.