Hello,
---
Procedure no.1
---
Analysis > Measure > hold CTRL and select all edges (one by one) and you will get requested value.
---
Procedure no.2
---
- create a copy of model face, which contains your contours. Select the face > CTRL+C > CTRL+V > finish feature
- activate Find tool
- Look for: Edge, Look by: Feature, on History tab select Last Feat option > click Find Now
- select all selected items (CTRL+A) in "found list" and send the to "selected list" > click Close
- Analysis > Measure
Maybe you can create a macro processing steps 2.-5.
Martin Hanak