Yes, it is true. If a rod is moving at a certain speed v, its contracted length is given as , v < c where lo is the length of the rod at rest, i.e. the length varies when measured from different frames.
Therefore, the same rod may have two different lengths depending on the state of the observer.
If the observer and the rod are moving with the same speed v in the same direction, then length of the rod l is equal to lo.
Also, if they are moving with the same speed v in the opposite direction, the measured length of the rod measured is given by