How did they come up with the Weight class System?

The original eight weight divisions, which still use the same limit, were first set in stone by the National Sporting Club of London way back in 1909. Before that, often the reigning champion (especially) and challenger agreed to a certain weight limit for each of the respective fights. The Junior divisions are a little bit trickier because they came around at different times (starting in 1920 when the Walker Law came into existence and instituted the Jr. Welterweight division). But of the two you alluded to; The Jr. Lightweight division's first recognized world champion was Johnny Dundee, but there was a fighter from about 15/20 years before that who had laid claim the the 130 pound title, and that was a fighter by the name of Battling Kid Nelson (who defeated Fritz Schmidt in a ten rounder for the claim, but was not universally recognized). Nelson isn't credited as being a world champion, but I would think he had quite a bit of influence in decideding that weight limit. And as I already stated, the Jr. Welterweight division first came into existence with the Walker Law in 1920, and the first champion of that division was Pinky Mitchell. Mitchell won the title under unique circumstances, as he was actually voted in as that divisions first champion by people who bought an old boxing mag called the 'Boxing Blade'...Didn't win a fight to win it, but he won the popular vote by boxing fans. So it all started when fighters agreed on catch weights, thanks for the info man.

Does anyone know how they came up with the divisions? and how much weight to the next division? I notice like 126 to 130 only a 4 pound gain to the next division Then there is 140 to 147 and that is a bigger gain at 7 pounds can someone please explain how this works. The original eight weight divisions, which still use the same limit, were first set in stone by the National Sporting Club of London way back in 1909. Before that, often the reigning champion (especially) and challenger agreed to a certain weight limit for each of the respective fights. The Junior divisions are a little bit trickier because they came around at different times (starting in 1920 when the Walker Law came into existence and instituted the Jr. Welterweight division). But of the two you alluded to; The Jr. Lightweight division's first recognized world champion was Johnny Dundee, but there was a fighter from about 15/20 years before that who had laid claim the the 130 pound title, and that was a fighter by the name of Battling Kid Nelson (who defeated Fritz Schmidt in a ten rounder for the claim, but was not universally recognized). Nelson isn't credited as being a world champion, but I would think he had quite a bit of influence in decideding that weight limit. And as I already stated, the Jr. Welterweight division first came into existence with the Walker Law in 1920, and the first champion of that division was Pinky Mitchell. Mitchell won the title under unique circumstances, as he was actually voted in as that divisions first champion by people who bought an old boxing mag called the 'Boxing Blade'...Didn't win a fight to win it, but he won the popular vote by boxing fans.

very true can you imagine how the champs would look like right now. That would be crazy imagine the welterweight division damn 140-147 that would be ridiculous all the talent in there and they would all have tight fight each other!

All these stupid "junior" and "super" classes HAVE to go. very true can you imagine how the champs would look like right now.

All these stupid "junior" and "super" classes HAVE to go.

I'm not sure but I think they need to get rid of alot of them I mean come on what the fuck difference does 4 pounds make? none.If they got rid of some of these bullshit weight classes it would make boxing much better. ^ya and it would force figthers to fight instead of avoiding fighters by hiding in divisons and not going up in weight or down.

Does anyone know how they came up with the divisions? and how much weight to the next division? I notice like 126 to 130 only a 4 pound gain to the next division Then there is 140 to 147 and that is a bigger gain at 7 pounds can someone please explain how this works. I'm not sure but I think they need to get rid of alot of them I mean come on what the fuck difference does 4 pounds make? none.If they got rid of some of these bullshit weight classes it would make boxing much better.

I dont know but there were originally only 8 weight classes Heavyweight, Lt Heavy, Middleweight, Welterweight, Lightweight, etc..