Here is my GrizzBridge under a Speer Winter Tarp.... this tarp isno longer made but similar to some. Dimensions: Ridgeline .... 128" or 10' 7"
Width at narrowest .... 102" or 8'6"
Weight ... 16.95 ounces or 1 pound .09 oz or 480 gram
In my opinion Bridges need a long ridgeline due to the bridge type suspension.

Grizz Bridge set-up by Sean Shug Emery, on Flickr