Silica sands are measured by mesh sizes, the bigger the mesh number the smaller of the sands in diameters individually. By that said, the #60 mesh sands are finer than #30 by half of the particle size. We recommend to use different sized sands for different type of artificial grass applications. In general, #16-20 mesh sands to be used for most landscape turf products, either #30 or #60 mesh sands to be used for putting greens as the fibers on putting green products are very tight and the smaller the particles the easiler to be brushed in. If you have any other questions specifically related to your project, please contact us by phone: 877 796 8873 or email us at in[email protected], or simply fill out this online form: https://www.globalsynturf.com/free-quote, thank you.