We have just upgraded our frame kit page of our website to support full custom mat and frame sizes, double/triple mats, and no mat. Just go to FRAMES - COMPLETE KIT on the top menu bar. The first screen will ask how many mats you want in the frame. On the next screen select CUSTOM in the size pull-down and enter your frame dimension and select the components you need. If you need more info about the component choices you can click on COMPONENTS on the top menu bar. Once you are comfortable with what you need, you can return to the frame kit page to quickly order everything without having to enter the dimensions over and over again.