My wife always said "size does not matter". Her EX was a huge 8 plus and thick and a poor cummer. She never orgasmed with him. 2 strokes and he spurted a drop or 2 of cum. His 2nd round was even worse. He always left her hungry. She had to satisfy herself.
Her preference was always, average length and girth and a huge cummer. Being 7 cut with average girth and able to flood her several times is her opinion to a great fuck.