A ruler
It look like 1.93
where is .39 on a ruler
0.8 = 8/10 on a ruler
2.5 cm looks like about 1 inch on a ruler
i inch
A ruler
1.4 cm is the same as 14 mm on a ruler
1.77 inches
one and 1/4
6.14" is the length of a U.S. Dollar bill. Measure it with your ruler.
show me what 4mm look like on a ruler. Compare 4mm to another image, like a bug or a dime, or a string etc.