[High-quality Materials & Durable]:This mat is made of high-quality paper material, which has characteristics of environmentally friendly, not easily deformed, anti-aging, durable and tough.And this mat is also adopted a acid-free design,so that it is very safe to use, and will not produce any or harmful substances to the human body.[Standard A3 Size & DIY Design Possible]:The outer size of this 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 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 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 Mat]:Using this kind of 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 mat.color: WhiteMaterial: paperPackage Contents:10 x Picture Frame MountsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.