Is my penis size normal and/or enough to pleasure a woman?

Hello there, 

I'm a 20 year old male and I have always thought my penis looked a bit on the small size and it's making me worry that it's not going to be enough to pleasure a woman. 

I measured my penis, using both bone-pressed and non-bone-pressed methods. Non-bone-pressed, my penis is about 10 cm long (4 Inches) and bone-pressed, it's 13.5 cm long (5.3 inches). Additionally, my scrotum sack looks small and sort of 'checks-in' towards my body.

Finally, I guess I should mention that I'm on the heavy size, since I weigh about 120 KG's, or 264 pounds, and I'm 169 cm's tall, or 5'7".

So, my question is as follows: Is that size normal and enough to satisfy a woman sexually? If not, is there anything I can do about it? And if I lose the extra weight, is there any chance that there's a part, even a small one, of my penile length 'buried' under all that excess fat? Thanks in advance!