Twelve Oaks Flooring Foundation Premium Empire is a dryback - glue down plank vinyl flooring with a 5mm thickness and a 20mil wear layer for lasting durability. Plank dimensions are 12" wide by 24" long. Each box covers about 20.1 square feet. This product is FloorScore certified, ensuring safety and quality for your space. Category: Vinyl. Brand: Twelve Oaks Flooring. SKU: VTT1023.