Complex sentence: The codex contains 41 leaves (30 cm by 25 cm), written on parchment in large uncials (over 1.5 cm), one column per page, and 16 lines per page.
Split into simpler sentences: The codex contains 41 leaves (30 cm by 25 cm). Written on parchment in large uncials (over 1.5 cm), in one column per page, and 16 lines per page.