Use what the pros do for backing your mats, photos, prints and cards. Acid-free 100% cotton foam core backing, made by Bainbridge. 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 1/8" 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. A6 Foam Core fits into our standard A6 sleeves.