About the product
- Paperboard surface is neutral PH. Smooth, non - glare finish
- Mats can be decorated with oil and water - based artist paints, mediums, inks, watercolors, markers, pencisl crayon etc
- Board thickness is 18 ply
- Mats have straight cut, non - beveled edges
- Outside Mat Size : 12" x 16" and Art Size : 9" x 12", The (inside) frame cut-out is slightly smaller than 9"x12" as it is designed to accommodate a 9"x12" image" - the opening measures 8"x11"
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