I'm looking for gift for baby shower party. What clothes should I choose for a newborn?

You can buy clothes for 'newborn size' or 0-3months. You can also buy a 'My First Year' memory book that the parents can fill in. You could buy a blanket and a rattly toy or baby bath wash and bath toys. I would go to a baby store and have a look around or ask the shop assistant for help. :-)