Talmud for Shabbat 156:5
מיתיבי המוציא נייר מחוק ושטר פרוע אם יש בלובן שלו כדי לכתוב שתי אותיות או בכולו כדי לכרוך ע"פ צלוחית קטנה של פלייטון חייב ואם לאו פטור בשלמא לרב ששת דאמר מאי שתי אותיות שתי אותיות של קשר מוכסין שפיר אלא לרבא דאמר שתי אותיות דידן ובית אחיזה דהיינו קשר מוכסין הכא בית אחיזה לא צריך קשיא
<b><i>GEMARA</i></b>. For a cord too, let one be culpable on account of as much as is required to make a hanger for a sieve or a basketsieve? — Since it chafes the utensil, people do not make it [thus].<span class="x" onmousemove="('comment',' Culpability is incurred only when the article transported can be used in its normal manner. ');"><sup>13</sup></span> Our Rabbis taught: As for palm leaves, the standard is as much as is required for making a handle for a basket, an Egyptian basket. As for bast; Others say:<span class="x" onmousemove="('comment',' 'Others' frequently refers to R. Meir, Hor. 13a. ');"><sup>14</sup></span> as much as is required for putting on the opening of a small funnel for straining wine. Fat; as much as is required for greasing under a small cake. And what size is that? — As [large as] a <i>sela'</i>. But it was taught, As [large as] a dried fig? Both are the same standard. Soft rags, as much as is required for making a small ball. Anti what size is that? As [large as] a nut.