To wear this O - neck spliced letter T - shirt, simply put it on like any regular T - shirt. It's suitable for casual outings, hanging out with friends, or even a laid - back day at work. When it comes to washing, turn the shirt inside out and use a gentle cycle in cold water. Avoid using harsh detergents as they may damage the fabric or fade the letter details. After washing, hang it to dry to maintain its shape. As for sizing, always refer to the size chart provided, because different suppliers and brands have different measurements. Picking the right size will ensure you get the most comfortable and stylish fit.