A group of napkins is commonly called a Wad. Other collective nouns you may see include Littering.
A collective noun for napkins can be referred to as a "stack," capturing the images of neatly placed, folded, and stacked napkins ready to be included in any dining experience or event. The stack exudes a sense of organization and preparedness, symbolizing convivial gatherings, hospitality, and attention to detail. With each napkin meticulously arranged in the stack, it envisions a resourceful and efficient presentation enjoyed by a group of discerning guests. Such a collective noun paints a picture of a well-appointed table, enhanced aesthetics, and an invitation to conviviality and shared joyful moments.
Known collective nouns for Napkins include: