Authentic baseball jersey question

[InsaneBoost]

If anyone owns an authentic baseball jersey and could help me out that'd be great.

I'm a big guy, fatty, but not really upper body, just have a big belly. I wear a 60 in the authentic football jerseys and it's fine, I guess it might be a little snug, but it's not tight at all on me.

It says that the 60 NFL jersey is equivalent to a 5x shirt and a 60 MLB jersey is equivalent to a 4x shirt.

My question is, for those who own them, are they the same size, like is a 48 NFL and MLB the same for those who can tell me? I'm going out to look for the jersey, but usually being a big guy it's hard to find size 60 so I'll probably have to order online.

I probably will never button the jersey so the belly problem wont affect me and I don't have huge arms or anything so I'm hoping I'll be alright, just looking for some input from those of you who own them.

Thanks!