Creo Options Modeler > References > Fundamentals > Creo Parametric User Interface > The Analysis Tab > Measuring Geometry > Measuring Entities > Using Specific Measurement Types > Length > To Measure Length
  
To Measure Length
1. Click Analysis > Measure > Length, or right-click the graphics window and choose Length from the shortcut menu. The Measure dialog box opens.
2. Select a reference entity to measure. The length value is shown in the measurement panel and in the Measure dialog box.
3. To measure the total length of more than one entity, hold down the CTRL key and select more entities. The total length value appears in the combined measurement panel for all the selected entities and in the Measure dialog box.
4. To treat multiple selections of connected curves or edges as one complex object, right-click the reference entity in the Reference column, and select the Use as Chain check box. The Chain dialog box opens.