Find the zero mark on the ruler
Identify the long numbered marks for whole inches
Count the smaller marks between whole inches
Use the longest small mark to find half an inch
Use the next shorter marks to find quarter inches
Use the even shorter marks to find eighth inches
Use the smallest marks to find sixteenth inches
Read the measurement from zero to the end point
Combine whole inches with the fraction shown by the small marks
Match the object’s edge to the nearest mark on the ruler