This is a measuring tape.

Hold the front of the tape at the point you wish to start the measurement from, and extend it to the point where you want to stop.

Read the first large number before your stop point - this will tell you the number of inches.
Read the smaller lines of various sizes. Remember what the various sizes will make up until your stop point.

This will tell you your fraction of an inch.

Then there will be your measurment of the object!