The OEM House of Doolittle Earthscapes Reversible Wall Calendar HOD3931 offers 12 months of dated planning with three full-color nature scenes on both sides. One side features a vertical format, while the other side presents a horizontal format, both equipped with a write-on/wipe-off surface and unruled daily blocks. The vertical side's blocks measure 1-3/8 x 2 inches, and the horizontal side's blocks measure 1-5/8 x 1-5/8 inches. This calendar includes self-adhesive hangers and a water-soluble marker, and is made with a high percentage of recycled material printed with soy ink.