How To Measure Matting For A Picture Frame. Measure the area of the print you want to view in your frame! I just eyeballed the placement, but you may want to use your ruler.
You can order a custom size frame, or order a larger standard size frame with a mat cut to make up the difference. 6 steps for how to paint a picture frame mat: The size of the photograph in the following example is 5x8, which is not one of our standard sizes.
When you are ordering your mat the opening size needs to be slightly smaller than your image size so.
There are two options to choose if you too have this problem. Subtract 1/2 inch from 8 1/8 to get 7 5/8 inches. Multiply both sides of example 1 by 4 and you get a nice, clean ratio of 4:5. Measure the outer most points (height and width) of the actual picture and add an inch to that and calculate the frame/mat using those numbers as the image size.