In the case of the New Testament papyri manuscripts, our early evidence for the Greek New Testament, size is irrelevant. They range from centimeters encompassing a couple of verses to a codex with many books of the New Testament. But all of them add something significant.
Daniel B. Wallace (1950–Present): New Testament Textual Criticism, the Documentary Method, and the Greek Manuscript Record
Daniel B. Wallace advances a documentary approach to the Greek New Testament, privileging early papyri and majuscules and grounding decisions in verifiable evidence.
PAPYRUS 137 (P137): The Recently Published Earliest Manuscript Fragment of Mark
The Controversial PAPYRUS 137 (P137) is a fragment of the Gospel of Mark in Greek in the form of a codex, which is written on both sides: the recto (right/front) side containing Mark 1:7-9 and the verso (back) side containing Mark 1:16-18. P137 has been dated paleographically to about 175-225 C.E.

