Column Protectors, 12-1/4" x 12-1/4" Inside Opening, 23-1/2" L x 23-1/2" W x 39-1/2" H, YellowProtect your building's columns from damaging bumps by moving vehicles Octagon configuration for more rebounding ability 100% rust proof Flexible deflection design Easy to assemble Nylon fasteners (included) for breakaway ability make these extremely versatile Protect columns under virtually any condition and temperature down to 0F Fits square or round columns up to 12"sq Inside Opening: 12 1 4" x 12 1 4" Opening Shape: Square Overall Length: 23 1 2"