NIKE REPLICA & NIKE AUTHENTIC MLB JERSEY SIZING

How does the Nike Authentic MLB jersey sizing guide work? There's like six different options when I open the size guide on the website. : r/baseballunis

Nike New York Yankees MLB Men's Official Blank Replica Jersey - Macy's

MLB Toronto Blue Jays (George Springer) Men's Replica Baseball Jersey. Nike .com

MLB Los Angeles Angels Men's Replica Baseball Jersey.

MLB Philadelphia Phillies Men's Replica Baseball Jersey.

I bought a FAKE Nike MLB Jersey.

MLB Chicago White Sox Men's Replica Baseball Jersey.