Acid-free 100% cotton foam core backing, made by Bainbridge. Use what the pros do for backing your mats, photos, prints and cards. Foamboard is super lightweight, cuts easily and is very sturdy. Our foam core boards are acid-free and archival, so you can rest easy knowing that your work won't yellow or turn brittle. Bright white, with a 3/16" core. Give your work a professional finish with our pre-cut Foam Core!

4-3/4" x 6-1/2" size is great for backing A6 greeting cards.