How much does your baby weight?

So I thought my 3 month old son was pretty chunky at 13.5lbs and 23.5 inches. But today I found out my friend's kid who is 2 weeks older than my son is 15lbs and 24 inches. And then my cousin's kid who is 3 weeks older than my son is 15.5lbs and 25inches.

So is my son on the skinnier end for a 3 month old???

How much does your 3 month old weight???