black rectangle that is about 6 cm next to a clear ruler
A black rectangle being measured on the cm side of a ruler between 1 and 7.
A piece of black fabric sits between 1 and 8 centimeters on a ruler.
Something black being measured on a ruler between 1 and 7 centimeters.
A clear ruler is on a table with a black piece of fabric next to it that goes to the 7 line.