Is five and a half inches big enough to please a woman?

Yes.
The female g-spot which causes orgasm is only two inches inside the vagina.

Most women actually find larger penises painful as they bang against the cervix. The "large penis culture" you find in pornography is not real. The actors are hyped up on dangerous drugs or they use penis extenders.

The average size is 5.5 inches to 6.5 inches.
Anything over over 6.5 inches is very uncommon.
Anything over 7 inches is extremely rare, you have more chance of finding a goat which excretes pure gold.
Yes.
The female g-spot which causes orgasm is only two inches inside the vagina.

Most women actually find larger penises painful as they bang against the cervix. The "large penis culture" you find in pornography is not real. The actors are hyped up on dangerous drugs or they use penis extenders.

The average size is 5.5 inches to 6.5 inches.
Anything over over 6.5 inches is very uncommon.
Anything over 7 inches is extremely rare, you have more chance of finding a goat which excretes pure gold.