4X4 Wooden Sign Posts. Choose between two lengths, 4x4 and 12 long. 4” x 4” (fit 3.5” x 3.5” square wood post) 63.

The opening on the bracket is 3/16 wide to accommodate.063 and.080 thick e911 reflective signs. Free shipping on orders over $25 shipped by amazon. The opening is also 3/4 deep.