A dress shirt, also known as a button shirt, button-front shirt, or button-up shirt, is a garment with a collar and a full-length opening at the front, which is fastened using buttons or shirt studs. Dress shirts are typically worn at work, during business meetings, or at nicer events, and are usually solid colors to give a formal appearance. They are designed for a more polished appearance, often professionally or formally, and are made from high-quality materials such as cotton, silk, or linen. Dress shirts are typically more structured, with long sleeves, a stiff collar, and cuffs that may accommodate cufflinks for added sophistication. They are usually worn with a suit, jacket, waistcoat, or tie, and are ideal for formal occasions such as weddings or business meetings.

Dress shirts are different from casual shirts, which are more suitable for a casual setting. Casual shirts come in a variety of patterns and colors and tend to be made of thicker materials like linen, flannel cotton, brushed cotton, or oxford. They usually have a more relaxed collar and are often worn without a tie. Short sleeves are also more appropriate for casual shirts, while dress shirts always have long sleeves.

In summary, a dress shirt is a formal garment with a collar and full-length opening at the front, which is fastened using buttons or shirt studs. It is typically worn with a suit, jacket, waistcoat, or tie, and is ideal for formal occasions such as weddings or business meetings. Dress shirts are different from casual shirts, which are more suitable for a casual setting and often made of thicker materials with a more relaxed collar.