In the beginning, the shirt was not tailored, but more like a nightshirt. It was not until the 19th century that men were able to get shirts that were tailored to their bodies. In 1837, buttons were sewn on the entire front of the shirt, and in the 1930s, the collar was attached, and this has remained so ever since. A man's dress shirt should fit you well so that it flatters your body. You can know where to buy these shirts via this guide.