Men's round neck cotton t-shirt, you typically want a comfortable fit. Here are some common specifications and sizes:Material: 100% cotton for breathability and comfort.Neckline: Round neck for a classic look.Fit: Regular fit for comfort and versatility.Sizes: Usually range from Small (S) to Extra Large (XL), with some brands offering sizes up to XXL or more. It's essential to refer to the brand's specific size chart for accurate measurements.