Examples of Stokes profiles obtained with SPIRou for EV Lac, DS Leo and CN Leo. In each panel, Stokes I (top), V (middle), and null polarisation profile (bottom; see Bagnulo et al. 2009) are illustrated in units of unpolarised continuum (I_c). Clear circular polarisation signatures are present, with a S/N of 5000, 5600, and 3080 for EV Lac, DS Leo, and CN Leo, respectively. The different magnetic activity level of the stars is shown by the different widths of the average line profiles in both unpolarised and polarised light.