When I get to the end of a length of fabric, I can't bear to waste the last piece on a preschool cape when I could cut a longer one.
This purple cape is 94cm long, back of neck to hem. In the first photo it is shown , floor length, on a 120cm tall mannequin (approx 6yr old). The second photo shows how it drapes on the floor on a 4yr old, but as the front curves up, it isn't a trip hazard.
Your chance to get a cape that your children will use for many years.