TT #264 · Parshas Tazria · Aliyah 7 · Passuk 48
English: or in the warp or woof of linen or wool, or in leather or any article made of leather,
Torah Temimah cites Sifra (Toras Kohanim) for the minimum woven size required for warp, woof, and related materials.
Sifra — Vayikra 13, Midrash Sefer
English: Might warp, woof, and other materials become susceptible in any size? The word “garment” teaches that, like a garment, they must be woven to the minimum size of three by three fingerbreadths.
Textual derivation
These textile materials are not susceptible at any size; they must be woven to at least three fingerbreadths by three fingerbreadths.