There is such a thing as too big but also it depends on the man. If he not care or he wants to make you feel pain he will do it. Be selective. I suffered a considerable amount of medical issues several years ago after a sexual rendezvous.
I was left with severe bruising of the cervix. Understand that I was in pain during sex but did not have any control stop any body. The bruising lasted for several weeks and sex was painful even after that for several more weeks with a normal size penis (8 inches)
I am a small girl, when I was examined after incident I was told anything over 3 inches is already too big for rough sex. This goes for most women because our vaginal entrance to cervix is on average only 3.5 inches. Go see your OBGYN to confirm your size, this is important.
I can obviously have sex with longer than 3 inches, my husband also who is well endowed but he is GENTLE with me. There are large men who will not try to ******* your vagina. That is way the size you cannot control, but you can be selective and who you choose. Any thing "hardcore" does not feel good, it is PAINFUL. Real life is not like porn videos, especially for small women. As for width, the thicker the better for me, fortunately I have not had equally bad experience with width as I have had with length.
Also avoid anal like COVID. It is terrible for rectum. It is not meant for that and requires constant lube which men WON'T DO. This is where their size can get extremely health threatening. I will never allow this ever again. I am VERY SPECIFIC to any man interested that there is NO ENTERING my rectum. Nightmare of health issues regardless of size. I think that it make them feel good to see you in pain but NO THANKS. It does not feel good, makes my stomach upset and completely takes away all pleasure sensations so no way of orgasm.
Hope that helps