This 3-1/4" long C Guide is perfect for barn doors 2-1/4" thick. Large enough to look proportional on a bigger door, but still minimal enought to look stylish. This floor guide keeps your door on track for totally smooth, reliable, and safe operation. Choose from seven finishes to coordinate with any barn door hardware. Built right here in the United States with solid steel, this C-shaped barn door floor guide ships in just 1-3 business days. Most orders placed by PST ship same-day.