The purpose of the research was to highlight the peculiarities of the extension and modelling of the curling at the Moldavian Karakul lambs and to reveal the relations of these properties with other qualities and characteristics of the skin for the improvement of the lamb selection procedures of the requested type. The researches were carried out on batch of Moldavian Karakul lambs from sheep flock of the Experimental Household of the National Institute of Animal Husbandry and Veterinary Medicine, Maximovca village, Anenii Noi district. From the nonparametric properties of the curling, have been investigated the extension, modelling and types of curling modelling, as well as their relations with other properties and characters of the skin, which ultimately determines the commercial value of the skin. The researches were carried out by the methods elaborated or perfected by us, according to the Sheep Karakul evaluation Instructions with principles of improvement in the Republic of Moldova. As a result of the research it was concluded that the curling extension, the modelling and the type of curling modelling at the lambs and skins Moldavian Karakul are very important properties, which directly or indirectly determine the commercial qualities and the market value of the skin as a whole. The excellent and appropriate extension of the curling is characteristic for the lambs and skins Karakul with the jacket, Kaukasian and coastal curling type. For lambs and skins Karakul with the flat curling type is characteristic of the weak extension of the curling. The highest excellent modelling rate has lambs with curling type flat (58.5%), coastal (50.4%) and jacket (26.4%). The most suitable modelling rate is lambs with the type of curling jacket (73.4%), costal (46.1%) and flat (35.0%). Curling modelling is in positive relationship with the length of the curls, the silk and the luster of the fibbers, and in the negative relation with the length of the fibbers. The lambs with jacket curling type, usually, have the parallel-concentric type curling modelling (48.9%) and mixed (49.9%). The lambs with the type of coastal and flat have predominantly parallel-scale modelling (81.4%) and (62.4%), respectively. The type of curling modelling is in a positive relation to the silk and luster of fibbers, and in a negative relationship with leather thickness and fibber length. Knowing the particularities of extension and modelling of the curling at the Moldavian Karakul lambs and the relations of these properties with other qualities and characters of the skin allow for the efficiency of lamb selection of the requested type.