Creates a distinctive, natural flagstone appearance for stunning outdoor spaces. Irregular shaped units have clearly defined notches that fit together making installation quick and easy. To estimate the number of units needed to complete the project, simply calculate the square feet of your project (length x width) and divide by 0.9. Ideal for patios and walkways. Color, dimension, weight and texture may vary slightly due to natural materials used during manufacturing. Color, dimension, weight and texture may slightly vary due to natural materials used during manufacturing. Lowe’s Canyon Stone 12-in L x 18-in W x 2-in H Brown/Charcoal Blend Concrete Patio Stone | KCSS18BC