IFDL - left tab   4 x 2.5 in. 
IFDR - right tab  4 x 2.5 in.
IFDC - center tab  4 x 2.5 in.

* All INFODEX cards printed on:
Heavyweight .009pt – 110# Index Paper
8 Pastel paper colors: White, Yellow, Blue, Green, Pink, Gray, Ivory and Salmon.