This matte black curtain rod is adjustable from 16 to 45 inches. And we have 4 sizes to choose from to fit your windows. Note:Size 16"-45" is the curtain rod size, not the window size. Please add 10 inches to your window size when choosing the rod size. Our 3/4 pipe diameter and 0.8MM thick window rods for curtains hold 70% more load-bearing capacity than ordinary 5/8 tube single window rod. Our matching heavy-duty brackets and solid screws allow the single curtain rod to hold up to 50 lbs. This unique metal curtain rod perfectly matches various home styles (simple, retro, modern, rustic, industrial etc.), and fabrics of a variety of materials (satin, polyester, velvet, organza, burlap, and blackout curtains). An installation instruction is included with the package, you can mount these standard curtain rods easily.