The Sublimation Socks eBook includes three different gauges (6 st./in. by 8 rows/in., 7 st./in. by 10 rows/in., and 8 st./in. by 12 rows/in.) of one sock pattern, each in three different sizes (small, medium, large). That’s three gauges of the pattern for less than the price of two! You should purchase this eBook if you plan to make sublimation socks in multiple gauges. Otherwise, swatch and choose the pattern that most closely matches your row gauge. (And if you change your mind, you can upgrade from a single pattern to the eBook for the difference in price---$3.)