Square Deal Recordings & Supplies (50) Horizontal Trading Card Divider Cards - Black - Standard 20 Mil- 2-3/4 x 3-3/4 TCNS28BK20 Fits In Boxes Designed to Hold Cards Horizontally Perfect for Organizing Your Trading Cards Reusable - Just turn it around or turn it over! 2-3/4" x 3-3/4" 20mil Thick