25 Lighthouse VARIO 3S pages - Professional Pack Each sheet measures 8-1/2" x 11" 3S is black with three 7-5/8" x 3-1/4" pockets per side Double sided (pockets front and back) Archival quality - 100% FREE of acid and chemical softeners and will not harm your stamps Made in Germany by Lighthouse, a world leader in high quality stamp and coin products