Q.What Are The Dimensions Of The “simple Metal Collar (2 Feet) Around A Tree Trunk” To Keep Squirrels Off The Fruit
I presume “2 feet” is the diameter of the collar. What is the height, recognizing that squirrels can jump 5-6 feet.

Certified GKH Gardening Expert
The strip will be 2 feet wide, and as long as it takes to wrap around the trunk. The trick is where you position the collar! This should be placed about 5 or 6 feet from the ground. This is so that the squirrels cannot jump up passed the collar. Though it may make it to the collar, it will be unable to span that 2 foot gap, since their claws will slip on the metal.
If there are other trees nearby that the tree can jump from, you may want to collar them, as well.