Laminate Dark Birch by NAF - Floors@Work is a durable and stylish laminate flooring option that adds warmth and texture to any space. Made with a 12mm core, this flooring is built to handle daily wear and tear. Each plank measures 6.61" wide and 47.83" long, creating a spacious and balanced look. One box covers approximately 21.97 square feet. Rated AC4, this laminate is designed to perform well in busy areas of the home. Category: Laminate. Brand: Naf Flooring. SKU: NAF-DBIRCH.