We recommend using waterstones for your day to day sharpening and these Ohishi Waterstones are the best we've come across. They cut quickly but are dense and hard enough not to require soaking prior to use. A spritz of water is all you need to get to work. The 1,000 grit will establish your secondary bevel and the 10,000 grit yields a beautiful final polish.
Dimensions are 8" long, 3" wide, and 1" thick.