I bought two of the ORIGINAL PENGUIN MEN'S EARL POLO shirts because Amazon is having a sale if you use your Amazon card to buy clothes. Anyway, I only own one other PENGUIN polo shirt and it is also in the "heritage" slim fit style, which means that you should go up one-size than you normally wear (unless you are really skinny). Although the "Heritage Fit" isn't listed in the title, it is listed in the product description, and both shirts I ordered have the "heritage fit" label in them.

My shirt size is a large and so I went up to an XL in the PENGUIN EARL POLO and it fits me just right. I wear a 42 in suit jacket, waist 34, weigh 184lbs at 5' 9" and have an athletic build, measuring about 43 (at the widest part of my chest) on a tailor's measuring tape, and the XL in Heritage Fit has a really nice and flattering fit on me. Neither too big, nor too tight, it's perfect.

I got the colors "Grape Heather" and "Alaskan Blue" and both look great, although the "Alaskan Blue" the piping around the collar and placket looks a little off-white with a tinge of yellow rather than lemon yellow like it does in the item picture.

Anyway, I think the ORIGINAL PENGUIN EARL POLO can be worn with either shorts, jeans, or slacks and it doesn't make you look nerdy -- unless that's the look you're going for.