How Big Is 3 Centimeters?
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How big is 3 centimeters? To visualize 3 centimeters (cm), or how big 3cm is, think about the end of your thumb. On average, the distance between the first joint in the tip is 1 inch — and each inch equates to 2.54 centimeters. This means that 1 3/16 inches is about 3 centimeters, and, in turn, 3 centimeters is just slightly longer than the average thumb from the first knuckle to the tip.
Other visual representations that can help you visualize how big 3 centimeters is in length include a dollar bill folded in half lengthwise, which measures about 3.2 centimeters, and the diameter of a quarter, which is 2.5 centimeters across.
