This flat-knit glove is a winner by itself or under a pair of glove shells. Smartwool provides year-round comfort with the heat-regulating properties of no-itch, no-stink Merino wool. Measuring note: Measure around a flat hand at the knuckles, without your thumb. Measure your hand length from the palm base to the end of your middle finger. Use the larger of the two measurements to select your glove size.