Reference for Kelim 14:1
כְּלֵי מַתָּכוֹת, כַּמָּה הוּא שִׁעוּרָן. הַדְּלִי, כְּדֵי לְמַלֹּאת בּוֹ. קֻמְקוּם, כְּדֵי לֵיחֵם בּוֹ. מֵחַם, כְּדֵי לְקַבֵּל סְלָעִים. הַלֶּפֶס, כְּדֵי לְקַבֵּל קִיתוֹנוֹת. קִיתוֹנוֹת, כְּדֵי לְקַבֵּל פְּרוּטוֹת. מִדּוֹת יַיִן, בְּיַיִן. וּמִדּוֹת שֶׁמֶן, בְּשָׁמֶן. רַבִּי אֱלִיעֶזֶר אוֹמֵר, כֻּלָּן בִּפְרוּטוֹת. רַבִּי עֲקִיבָא אוֹמֵר, הַמְחֻסָּר חֲטִיפָה, טָמֵא. וְהַמְחֻסָּר לְטִישָׁה, טָהוֹר:
[Broken] metal vessels: what is the minimum size of [for them to be susceptible to impurity]? A bucket - large enough to draw water with it. A kettle - large enough so that water can be heated in it. A boiler - large enough to hold <em>selaim</em> [coins]. A cauldron - large enough to hold jugs. Jugs - large enough to hold <em>perutot</em> [small coins]. Wine-measures - [large enough to hold] wine, and oil-measures - [large enough to hold] oil. Rabbi Eliezer says: for all these, large enough to hold <em>perutot</em>. Rabbi Akiva says: a vessel that lacks trimming its edges is susceptible to impurity, but one that lacks polishing is pure.