12cm.
1cm is 10mm, so 12cm will be 120mm
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12 mm. 12 mm.
Yes, 12 centimeters (cm) is larger than 102 millimeters (mm). There are 10 millimeters per centimeter, so for some perspective, 12 centimeters is 120 millimeters, which is larger than 102 millimeters.
12 cm is larger than 102 mm because, since 1 cm is a 100th of a meter and a mm is 1000th of a meter a centimeter is ten times a millimeter, so 12 cm is equal to 120 millimeters which is 18 millimeters longer than 102 millimeters.
Smaller
10 cm = 100 mm which is bigger than 38.5 mm