Baffle easily wraps around 1/2" to 1" diameter poles.  Wraparound design means you don't need to move pole or hanging feeders.  Decorative scalloped edge design.  18.5" diameter.

Notes from The Front Range Birding Company:  For a pole baffle to work properly, you need to have proper placement.  Baffle must be placed high enough off the ground so squirrels can't jump over it (4-5 feet), and the pole must be far enough way from trees, fences, and decks so squirrels can't just horizontally to the pole (7-10 feet).  It takes some experimenting sometimes, but this can work to stop squirrels!