Ideal ground cover around Japanese ornaments. The larger size is ideal for raked zen gardens as it is less likely to be moved by wind or rain. Blends and complements our range of larger granite rocks and boulders 20kg polybag. The name is not descriptive of the type of stone or location. Priced per polybag - Minimum order is 10 bags of the same product. Available in larger quantities at discount The granite gravel is supplied in 20kg bags can be carried or barrowed easily into place. We recommend minimum depth of 30mm for general spreading, and if to be raked into a pattern at least minimum depth of about 75mm. As a guide 1x20 kg bag covers approximately 0.85 square metres at a depth of 25mm 5 sq metres =6 bags 150 kgs 10 sq metres=12 bags 300 kgs 15 sq metres=18 bags 450 kgs 20 sq metres=24 bags 500 kgs Multiply this up for different depths If ordering a mix, you will get half of the quantity as 6mm, half of the quantity as 11-14mm - its not mixed in the bags. TIP : Use in conjunction with weed suppressant membranes.