Are you confused about the difference between nominal size and actual size when it comes to bifold doors? In this video, we explain the two terms and provide a general size chart for bifold doors. We discuss the variations in structure and hardware across different bifold door manufacturers and how the nominal size categorizes the door, while the actual size denotes the precise dimensions. Standard bifold doors come in a range of sizes, with common widths including 18, 20, 24, 28, 30, 32 and 36 inches, and typical heights of 80 and 96 inches. For four door doors, the sizes are wider, with standard dimensions extending to 48, 60 and 72 inches in width, along with 80 and 96 inches in height. Watch the video to learn more!