This cast-iron round baluster collar fits over 1/2"" square material. You can add this collar to a plain baluster to dress it up. Each collar is 1-5/8"" wide, 2-5/8"" high and weighs .57 lbs. These wrought iron components compliment any traditional or modern commercial or home design weather. By combining other designs, you can create a fence, stair or balcony railing that will make your project unique.