Twelve Oaks Flooring Foundation Premium Delta Marsh is a dryback - glue down plank vinyl flooring with a 5mm thickness and a 20mil wear layer for lasting durability. Plank dimensions are 9.375" wide by 59.88" long. Each box covers about 23.4 square feet. This product is FloorScore certified, ensuring safety and quality for your space. Category: Vinyl. Brand: Twelve Oaks Flooring. SKU: VFP1469.