Where should the neck circumference be measured?

The neck circumference should be measured at the position of the first button because this is the standard practice in garment fitting. This measurement ensures that the neckband or collar of a shirt will fit comfortably around the neck without being too tight or too loose, providing both style and comfort. Measuring at this specific location allows for more accurate sizing, as it aligns with where a collar typically rests when a shirt is buttoned up. This attention to detail is particularly important in ensuring a polished appearance in formal wear or business attire, where a well-fitting collar enhances the overall look of the outfit.

Other measurement points like the base or the middle of the neck do not represent how the garment will actually sit when worn, leading to potential discomfort or misfit. The waist is unrelated to neck measurements and would not provide any useful information for determining the fit of a shirt's collar.