Hi, Umar,
Thanks for posting the question to H.C.M.Forum.
There is MYTH in the brain of young that size of penis play a role in sexual intercourse.
2 nd thing you want to know about penis.
The size of erect penis ( fully erect) measures 10 -15 cm.( 4-6 inch).
Sexual performance depends upon one capacity to take time in intercourse, that varies from person to person ( both in male and female).
Ejaculation time is a performance.
I want to explain by an example suppose the size of a penis is 6 inch during erection and it takes only 10-15 seconds in ejaculation than person will feel
depression.
If size of penis is 4 inch during erection and it take 10-15 minutes in ejaculation than his partner will satisfy irrespective of size of penis.
As far as concerned about the thickness it not matters again performance play vital role.
Don't consult quacks and be realistic .
Enjoy life as you are a complete man, build confidence in yourself.
Hope I have answered your query.
If any further question I will be happy to help you.
Good luck.
Dr. HET