TT #179 · Parshas Shemini · Aliyah 5 · Passuk 32
Chabad.org — Vayikra Chapter 11 with Rashi
English: “Or a garment”: in other garments, the minimum measure is three handbreadths by three handbreadths.
Shabbos 27a.
E-Daf.com — Shabbos 27a (Tsurras Hadaf)
Textual inference — The rule applies to a garment at the specified minimum size.
The rule extends to the larger minimum for other fabrics.