–> –> –> –> –> –> >–> –> –> –> 18×24 Picture Frame Matting, Cream Core, Opening for 12×18 Image Crescent® mat board White backing, standard 4 ply pH neutral Opening for 12 x 18 image, Actual opening 11.5 x 17.5 to allow 0.25″ on each side to attach the image to the back of the matting. Opening bevel cut with cream core Custom opening sizes are NOT an option with this listing. Please contact us for further assistance. Made in the USA Ships next business day Product Code: MAT18241218