PIXEL PITCH is the measurement from the center of one pixel to the center of the next pixel. Pixel pitch is measured in millimeter. 10mm, 12mm, 16mm, 20mm ,25mm, 31.25mm. 10mm is extremely close together you will have a clearer picture than compared to a 25mm. In the outdoor led world P10 is high definition with 928 pixels per square foot. Our most popular and economical display is our P20 with 232 pixels per square foot.