This section is from the "A Complete Dictionary of Dry Goods" book, by George S. Cole. Also available from Amazon: A complete dictionary of dry goods and history of silk, cotton, linen, wool and other fibrous substances,: Including a full explanation of the modern processes ... together with various useful tables.
Darning Needles. A long needle with a large eye, used for darning with yarn or heavy cotton; sold at wholesale by the thousand, the sizes varying from 12coarse to 18 fine, with usually a rise in price of 10 cents per size; double long darners are sized 0 and 00. [See Needles]