[ Materials & ]:This photo frame mat is made of paper material, which has characteristics of environmentally friendly, not easily deformed, anti-aging, and tough.And this photo frame mat is also adopted a acid- design,so that it is very safe to use, and not produce any or harmful substances to the human body. [Standard A3 Size & DIY Design Possible]:The outer size of this photo frame mat is 29.7 x 42cm/11.69 x 16.54Inch, , which is very suitable for A4 size pictures.And the color is white, so that you can DIY a unique frame according to your own preferences or pictures. [Centered & 45 Cutting Design]:This photo frame mat is designed with two frames. The small frame is located in the middle of the big frame, which can display the picture content in the frame in the .In addition, the edge of the small frame is designed with a 45 bevel cut,. [Easy to Install]:This photo frame mat is very convenient to use without any tools and skills.Just remove the back panel from the frame,then you can put the photo mat directly into the frame [Excellent Photo Frame Mat]:Using this kind of photo frame mat is not only can effectively block the exposure of uneven edges caused by plastic sealing, cutting or any other reasons,but also the smaller pictures or paintings can be perfectly fixed in the frame without falling off.It is an excellent photo frame mat. color: White Material: paper Package Contents: 10 x Picture Frame Mounts