Approximatively 40 articles have been devoted to the biometry and hereditary determinism of ear characteristics of domestic sheep, starting with Adametz (1917). The normal length of ear may vary between 7 and 21 cm, with means between 9 and 17 cm, according to the breed. The mean width varied between 4.6 and 8.3 cm. From crossbreeding data and observations of histograms, the inheritance of ear length appears to be polygenic or quantitative. A specific trait known as “shortened ear” is apparently inherited as an autosomic, semi-dominant Mendelian trait. It has been described in traditional populations of nearly 20 countries. In the heterozygous state, a shortening of the pavillon is induced: between two-thirds and half of normal size. The homozygote has only vestigial external ears. In several cases, the frequency of the variant was estimated and it was proposed that its ubiquity is due to a recurrent mutation or migration, the latter being the most likely. A name has been proposed for the locus: Ear Length, symbol EL, with the two identified alleles: EL + (standard) and EL R (reduced). The heredity of pendants on the external side of the ear has been studied by Mendelian and population genetics methods. Pendants appear to be induced by a dominant allele with incomplete penetrance ( w 1 = 0.85 in the homozygote and w 2=0.43 in the heterozygote). A name has been proposed for the locus: Ear Appendage, symbol EA with the two identified alleles: EA + (standard) and EA P (pendants). Based on older literature the symbol DE for the locus Drooping Ear with the two alleles DE + (standard) for normal erect ear and DE D (drooping) for drooping ear, with an intermediate dominance, has been proposed to explain the hereditary determinism of ear attitude. In conclusion, there are few works which deal with the quantitative genetics of ear length and width, and the heredity of carrying of the external ear is also not well elucidated.