MTS Frames is proud to introduce our "Photo Mat Collection". These mats are buffered with acid free material to help preserve your collectibles for years to come. The Photo Mat Collection is available in six different mats which are listed below: Frame Size Opening Size Quantity of Openings 8X8 4 1/2X 4 1/2 1 10X10 4 1/2X 4 1/2 1 12X12 4 1/2X 4 1/2 1 11x14 4x6 2 10x20 4x6 3 16x20 4x6 4 All mats are centered so that they can be used vertically or horizontally. MTS Frames has the versatility to use any frame with any mat. Just choose the frame that best suits your needs and chose which photo mat you would like. Please see the ready made requirements when ordering this type of frame. In order to get the price for the photo mat collection take the ready made packaged price of the frame and add the mat price in order to get the final price.