Home > Postcards > Popular Sizes 2" x 4" 2.75" x 8.5" 3" x 4" 3" x 5" 3" x 6" 3.5" x 5" 3.5" x 5.5" 3.5" x 6" 3.5" x 8.5" 4" x 6" (Standard) 4" x 9" 4.25" x 5.5" 4.25" x 6" 4.5" x 6.5" 5" x 7" 5.5" x 8.5" 6" x 8" 6" x 9"
