I’m so freaking confused about women shoe sizes. Is a C the same as a D or W?

I used a brannock device to measure my feet and I’m a 10.5 C (women) My feet have gotten a little bigger with age, but finding new shoes has been so frustrating I want to scream.

I’ve tried googling but there are so many conflicting answers, including telling me C is narrow for women. It’s not. I tried specifically filtering for C width and still get options that say D and W.

Are C, D, and W relatively interchangeable?

I’ve tried on so many shoes but now I’m just in my own head and I have analysis paralysis. I can’t spend another evening in a shoe store. I know different brands can vary, but I’m just looking for a general and high level answer. Please, I’m desperate lol.