A T-shirt is a type of garment characterized by its shape and short sleeves, typically made of cotton fabric, though other materials such as polyester or blends may also be used. Here's a breakdown:

1. Basic Structure: A T-shirt typically consists of a body (front and back panels), sleeves, a neckline (commonly round or crew neck, but can also be V-neck or scoop neck), and sometimes a hem at the bottom.

2. Fabric: T-shirts are commonly made from cotton due to its softness, breathability, and comfort. However, they can also be made from other materials like polyester, rayon, or blends for specific purposes such as moisture-wicking or stretchability.

3. Styles and Designs: T-shirts come in various styles and designs, including solid colors, stripes, patterns, or graphic prints. Graphic T-shirts often feature images, logos, slogans, or artwork printed or embroidered onto the fabric.

4. Fit: T-shirts can have different fits, ranging from slim or fitted to relaxed or oversized. The fit can impact the overall look and comfort of the garment, and different fits cater to different preferences and body types.

5. Uses: T-shirts are versatile garments suitable for various occasions and activities. They can be worn casually with jeans or shorts for everyday wear, paired with skirts or trousers for a more dressed-up look, or used as athletic wear for sports and exercise.

6. Customization: T-shirts are popular for customization, allowing individuals or organizations to personalize them with their own designs, logos, or messages. This can be done through techniques like screen printing, heat transfer, embroidery, or direct-to-garment printing.