Shutter width is 15", and the standard length is 48" long. However, these sizes can be customized to what you need. I recommend taking a measuring tape, and measuring from the top trim to the bottom trim of your window to find the appropriate length you need. Going longer than 48" will increase the price as the material costs are higher, and going shorter will reduce the cost slightly. Custom sizes may add to the delivery time. Just send a note over with what you need and we'll gladly accommodate.