What is the minimum length and width for a tallit katan to fulfill the tzitzit obligation?

Synopsis

Later authorities raised concerns about the widespread practice of wearing very small tallit katans. Some specified that the minimum should be one and a half amot (with three-quarter amot front and back), corresponding to approximately 9 'vires' (a unit of measure used in Russia) per side.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

Discussion coming soon.

The Daily Law

One question. Every opinion. Every morning.

A new halakhic question and the full spectrum of rabbinic thought, delivered daily.