Just like people, pens come in all shapes and sizes. When selecting a writing instrument, the Goldilocks principle is in effect - there's a pen that will fit just right for your hand. When a pen design becomes successful, like Leonardo's Momento Zero, the manufacturer may create a new version in a different size to accommodate a broader market.
Following the success of Leonardo's first pen design, Salvatore Matrone, co-founder of Leonardo Officina, launched the larger Momento Zero Grande in September 2019. Aside from the size difference, the bigger brother has other features that set it apart from its sibling.