The size of FPC (Flexible Printed Circuit) and FFC (Flexible Flat Cable) cables is an important factor that determines their suitability for different applications.

FPC cables can vary significantly in size. The width of an FPC cable can range from a few millimeters to several centimeters, depending on the number of conductors and the complexity of the circuit it needs to carry. For example, in a small wearable device like a fitness tracker, the FPC cable may be very narrow, perhaps only a few millimeters wide, to fit within the limited space available and to connect the various small components inside. In contrast, in a larger electronic device such as a laptop or a industrial control panel, the FPC cable may be wider, say around 1 to 2 centimeters, to handle a larger number of signals and power connections. The length of FPC cables also varies widely. It can be as short as a few centimeters for connecting closely spaced components within a device, or it can be several meters long in some cases where the connection needs to be made between different parts of a larger system. The thickness of the FPC cable is another important dimension. It is usually very thin, typically in the range of a fraction of a millimeter to a few millimeters, which allows it to be flexible and conform to the shape of the device it is installed in.

FFC cables also have different size specifications. The width of FFC cables can range from very narrow for applications where space is extremely limited, like in some miniature electronic components, to wider widths for more demanding connectivity requirements. The most common widths are typically in the range of a few millimeters to a centimeter or so. The length of FFC cables can also vary from short lengths for internal connections within a device to longer lengths for connecting external peripherals. The thickness of FFC cables is relatively thin, similar to FPC cables, to ensure flexibility. The size of both FPC and FFC cables is carefully chosen based on the specific requirements of the electronic device, including the available space, the number of signals to be transmitted, the power requirements, and the mechanical constraints of the application. Manufacturers offer a wide range of sizes to meet the diverse needs of the electronics industry.