How do i Find the perimeter of an object

Hey my fellow sketch up community. Am looking on how i can i measure the length of the stripe (red) around the object CR to resemble the above in figure illustrated on attachment.
Thanks and regards
TerenceFinding_Perimeter.skp (683.7 KB)

Select all of the edges that make up the perimeter and find the length in Entity Info. I welded the edges together using Eneroth Auto Weld first to make them easier to select.

Please update your profile with the SketchUp version you are using.

Thanks Dave