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  • Buy 6 - 24 and get 25% off
  • Buy 25 - 99 and get 60% off
  • Buy 100 - 499 and get 70% off
  • Buy 500 - 999 and get 71% off
  • Buy 1000 - 4999 and get 72% off
  • Buy 5000 or above and get 73% off

Custom Size Openings and Custom Size Mats

Need an 'Opening Size' not listed? Easy, choose the Custom Opening option and type in what you want. Need a different 'Mat Board' size not listed? No problem, choose the next larger size mat and we'll cut it down to size for you. No extra cost for this.

Custom Opening Sizes

We will cut the opening EXACTLY as you type it in. If you type 8x10, the opening will be exactly 8x10. Please note that if your paper size or artwork is 8x10 it may fall through the opening. In this case, you would want to specify an opening of say, 7.5x9.5, to allow for a .25" overlap on all four sides of the artwork/photo. Subtract .5" from the actual photo or paper size to get this number.

Custom Outsize Dimenison Mats

To order a custom size mat, round up to next "standard" size outside dimension mat listed. Example, if you want a custom size mat of 11x15, you would select a 12x16 mat size; if you want a 17x22 mat you would select a 18x24 mat size. Simply select the larger mat size and then, during the checkout process, in the Order Instructions Box, type in which mats you wnat cut to a custom size. "18x24 mat cut to 17x22 Outside Dimension or OD". We will then cut the mat down to that size for you. No extra cost. Make sure your Opening Size is not too large for the new custom mat board size.

Product Description

Conservation White Backer Boards are solid bright white boards ideal for backing and adding some stiffness to unframed mats.

  • Smooth backing board that's solid white throughout
  • Alpha Cellulose, Acid-free, Lignin-free mounting board
  • 4-ply backing board, approx .055" thick

9x12 Conservation White Mounting Board

$3.03
Quantity: