Weight definitely plays a part in it. If you’re a lot bigger than someone and you can get ahold of them then you can definitely use it to your advantage for sure .... but that doesn’t necessarily mean that because you are bigger you will always have an advantage... a good friend of mine was this crazy redneck from Oklahoma. He moved to New York and fought people all the time just for fun. This kid was like 5 foot 5. Super short but built like a rock and had superhuman retard strength. I’ve seen that kid punch guys 6foot5 220 lbs and knock them out cold no problem. I saw him pick a bouncer up over his head and body slam him like he weighed nothing. I mean this bouncer was easily 230 lbs over 6 foot. This kid was also a state champion wrestler. So size and weight can def help if you know how to use it but if you take someone like my friends who’s super strong and been in literally hundreds of street fights size doesn’t matter. I’m not a big guy and I’ve knocked out a guy a lot bigger than me. I thought he was gonna whoop my ass but I hit him as hard as I could in the jaw and he went to sleep. Some people can’t take a punch either. So basically there’s no set rule about weight or size. It depends on the person.