Review on U S Polo Assn Multi Medium Men's Clothing by Samuel Hansen

I don't know why all the size charts are the same in every US polo shirt, although in real life they are very different, I used to buy many US polo shirts polo t-shirt, but every time, when i get a different shirt size either too small or too big even though they have the same size charts and i always wear a medium size for example this one is too big for a medium size.