
I don't know why all size charts are the same on all US polo shirts, although in real life they are very different. I've bought a lot of American polo shirts but every time I get a different shirt size either too small or too big even though they have the same size charts I always wear a medium size for example this one is too big for a medium size.

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Off White Men's Clothing: Amazon Essentials Lightweight Active Sweatshirt
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Newzill Compression Calf Sleeves (20-30MmHg) For Men And Women - Ideal Alternative To Compression Socks, Perfect For Running, Shin Splints, Medical Needs, Travel, And Nursing
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H2H CMTTS267 Athletic Performance T-Shirt for Improved Performance
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Cimic Black Athletic Short Sleeve T-shirts 520
50 Review