How to > Advanced features and topics > Analyze > Measure > Measure distances > Measure length of edge
  
Measure length of edge
To measure the length of an edge:
1. Click Analysis and then, in the Measure group, click the arrow next to Distance.
2. Click Edge Length. The Measure Output and Distance dialog boxes open.
3. Click an edge on the object. The viewer displays the length of the selected edge in the Distance Output box.
4. You can click further measure options, or click to complete the operation.