Rated 5 out of 5 by Lufu from Great quality I bought three bags of this gravel to create a gravel garden, I was very pleased with the quality, all three bags contained a very good amount of stones and they were all excellent quality with very little dust or sand. Also the delivery driver was very polite and helpful. 20mm Gravel, Bulk Bag | Departments | DIY at B&Q Please note: You are currently browsing img blooma cotswold buff decorative stone departments diy that is 1443x1443px in size. This image is listed in decorative garden stone chippings category. 20mm Gravel, Bulk Bag Departments DIY at BQ, 1443x1443 in 308.63 KB.