Maintenance and discard patterns are a central aspect of projectile point analyses. Unfortunately, while the examination of maintenance and discard patterns for lithic technologies is well advanced, osseous projectile point maintenance and discard analyses remain in their infancy. In the Magdalenian context, a large part of this situation is owing to the fact that the form and proportions of osseous points at the time of initial manufacture have rarely been clearly described, nor particularly well understood, by researchers. This paper focuses on uni- and bilaterally barbed points manufactured from antler and dating to the Late Magdalenian. Through examination of 732 barbed point artefacts recovered from 18 sites located throughout France and Germany, along with engravings on portable art, and a brief consideration of ethnographic data, an updated proposal for the original proportions of these iconic barbed weapon tips can be made. Knowledge of these dimensions is essential if researchers are to reconstruct the reduction of these artefacts through use, maintenance and rejuvenation cycles.