We present the photometric and spectroscopic analysis of five Type Ibn supernovae (SNe): SN 2020nxt, SN 2020taz, SN 2021bbv, SN 2023utc, and SN 2024aej. These events share key observational features and belong to a family of objects similar to the prototypical Type Ibn SN 2006jc. The SNe exhibit rise times of approximately 10 days and peak absolute magnitudes ranging from -16.5 to -19mag. Notably, SN 2023utc is the faintest Type Ibn supernova discovered to date, with an exceptionally low r-band absolute magnitude of -16.4mag. The pseudo-bolometric light curves peak at (1-10)x10^42^erg/s, with total radiated energies on the order of (1-10)x10^48^erg. Spectroscopically, these SNe display relatively slow spectral evolution; the early spectra are characterised by a hot blue continuum and prominent HeI emission lines. Early spectra show blackbody temperatures exceeding 10000K, with a subsequent decline in temperature during later phases. Narrow HeI lines, indicative of unshocked circumstellar material (CSM), show velocities of approximately 1000km/s. The spectra suggest that the progenitors of these SNe underwent significant mass loss prior to the explosion, resulting in a He-rich CSM. Light curve modelling yields estimates for the ejecta mass (M_ej_) in the range 1-3M_{sun}_, with kinetic energies (E_Kin_) of (0.1-1)x10^50^erg. The inferred CSM mass ranges from 0.2 to 1M_{sun}_. These findings are consistent with expectations for core-collapse events arising from relatively massive, envelope-stripped progenitors.