The present invention relates to a Solanum lycopersicum seed designated 12N 808 RZ, whereby a plant grown from such seed may exhibit resistance to Verticilium spp. (Va and Vd), resistance to Stemphylium spp., a very large fruit size of about 300-350 g, short to medium plant height, and very strong ribbing at the peduncle end. The present invention also relates to a Solanum lycopersicum plant produced by growing the 12N 808 RZ seed. The invention further relates to methods for producing the tomato cultivar, represented by tomato variety 12N 808 RZ.