All of our frames are measured by the inside dimensions. For example, if you have a 4×6 image, you will want to order a 4×6 frame. A frame’s dimensions refer to the size of its opening. It is a common mistake to think the dimensions are the width and height of its outside edges. However, you want to measure the inside edge. For example, if you have a 4×6 image, you should order a 4×6 frame regardless of how much bigger than that the frame may be from outside to outside edge. Some frame styles will overlap the edges of an image more than others.