Measure the width of your opening. Determine which width's range (S, M, or L) your width falls within, then select your door appropriately. When you come to the page "Instruction to the Seller", please type in your exact dimensions (width and height) and the color (black or bronze) that you want for your doors. We will confirm your order within 24 hours. Please visit our Info Center for more information on how to measure/fit your fireplace doors. Please allow 3 weeks for fabrication.