https://www.dollargeneral.com/p/artskills-white-poster-board-14-in-x-22-in/79784909809
Buy ArtSkills White Poster Board, 14 in x 22 in from Dollar General - Instore
white poster board
https://www.theroyalstore.com/product/poster-board-white-11x14-royal-brites/
White Poster Board 11x14 inches, 2-Sided, Water & UV Resistant
white poster boardinchessidedwateruv
https://www.eroswholesale.com/11-x-14-white-poster-board-5-pack.htm
11" X 14" White Poster Board (5/Pack)
Please see item image for details.
white poster boardxpack