Shown here are three Crescent 918 (Very White) mats with one Crescent 33 (White & Cream) mat for color comparison. From left to right sizes are: 18x24 White & Cream, 8x10 Very White, 16x20 Very White, and 11x14 Very White. All of my double mats have an inset (space between front and back mat when double matted) of 3/16" except the Very White 16x20 and Very White 18x24 which has an inset of 1/4". Prices for unframed double matted pieces are as follows: 8x10-$28.00, 11x14-$33.00, 16x20-$49.00, 18x24-$59.00.