TT #256 · Parshas Tazria · Aliyah 7 · Passuk 47
English: If a garment has a lesion of tzaraas, whether in a wool garment or a linen garment,
Chabad.org — Chumash, English translation + Rashi for Vayikra 13:47
Torah Temimah cites Shabbos 26b for the minimum cloth size included in the garment category.
E-Daf — Shabbos 26b · Shas.org · Sefaria — Shabbos 26b, source text and translation
English: The garment category includes the minimum specified cloth size.
Textual derivation
The word “garment” includes even a cloth piece measuring three fingerbreadths by three fingerbreadths.