My penis is 5inch is that ok?thanks

Yes: It's normal length, don't worry.

That's just fine: This is right at the average for a guy when he's excited. The pictures on the internet have created something of a distorted idea of what a guy is supposed to look like. A guy who's really big is at a disadvantage -- he's incompatible with many women, has less ability to stimulate the most sensitive nerves at the front & probably can't get as hard. Enjoy what you have & use it responsibly.