StoreSMART Black Folding Business Card Holders - 10 pack - Polypropylene Plastic (RPP2915BK10) Keep your cards neat and organized. Holds over 15 cards per side. Made of Color Archival Poly Plastic on the front with Two Crystal Clear pockets on the inside Durable polypropylene archival plastic withstands the test of time! Wont tear, wilt, or dog-ear. Insert size: 2 1/8" x 3 3/4". Outside size folded: 2 1/2" x 4". Outside size open: 4" x 5". Available in a variety of colors: Yellow, White, Powder Blue, Pink, Orange, Metallic Violet, Metallic Silver, Metallic Maroon, Metallic Green, Metallic Gold, Green, Clear, Metallic Blue, Navy Blue, Black and Red.