Creative Mines Carved Rectangle Flats Knapsack 10 in. x 20 in. Big Box (100 sq. ft./box). The Creative Mines Carved Rectangle Flats in Knapsack color are a versatile and stylish addition to any landscape project. With a coverage area of 100 sq. ft. per box, these flats are perfect for creating stunning pathways, patios, and outdoor living spaces. Crafted with precision and attention to detail, these flats feature a unique carved design that adds depth and texture to your landscape. Made by Creative Mines, a trusted brand in the industry, these flats are part of the Big Box series, offering ample quantity for larger projects. Lightweight and easy to handle, these Carved Rectangle Flats are a must-have for any landscape enthusiast.