One and a half inches (1.5 inches) equal exactly 3.81 centimeters (cm) or 38.1 millimeters (mm). That’s halfway between one and two inches on a ruler. To picture this length, imagine two US pennies placed edge to edge or a large coat button
10 inches equal exactly 25.4 centimeters (cm) or 254 millimeters (mm). To picture this length, think of the longer side of a standard 8 × 10-inch photograph or the diameter of a dinner plate specifically sized at ten inches. Knowing what 10 inches
9 inches equal exactly 22.86 centimeters (cm) or 228.6 millimeters (mm). That’s three-quarters of a foot or one-quarter of a yard. To picture this length, think of the shorter edge of a 9 × 12-inch drawing-paper sheet or the diameter of a plate
8 inches equal exactly 20.32 centimeters (cm) or 203.2 millimeters (mm). To picture this length, think of an eight-inch chef’s knife blade, the diameter of an eight-inch dessert plate, or the shorter edge of A4 paper, which measures slightly more at approximately 8.27
7 inches equals exactly 17.78 centimeters (cm) or 177.8 millimeters (mm). To picture this length, think of the longer side of a standard 5 × 7-inch photograph or a dessert plate measuring seven inches across. Knowing what 7 inches looks like can be
Six inches equal exactly 15.24 centimeters (cm) or 152.4 millimeters (mm). That’s half a foot, roughly the length of a US dollar bill or the longer side of a standard 4 × 6-inch photograph. If you’re wondering what 6 inches looks like in
5 inches equal exactly 12.7 centimeters (cm) or 127 millimeters (mm). To picture this length, think of the longer side of a standard 3 × 5-inch index card or five US quarters placed in a row, which measure approximately 4.78 inches together. Knowing
4 inches equal exactly 10.16 centimeters (cm) or 101.6 millimeters (mm). To picture this length, think of the shorter side of a standard 4 × 6-inch photograph or two AA batteries placed end to end. Both provide familiar ways to understand what 4
Three inches equal exactly 7.62 centimeters (cm) or 76.2 millimeters (mm). To picture this length, think of one side of a standard 3 × 3-inch sticky note or the shorter edge of a 3 × 5-inch index card. Both provide a familiar reference
Two inches equal exactly 5.08 centimeters (cm) or 50.8 millimeters (mm). To picture this length, think of a standard AA battery, which measures almost 2 inches from end to end, or the short side of a US business card, which measures exactly 2