Thin Elastic Cords: Stretchy Cords By The Spool (Roll) / 300 ft - 1/16" (D) - usalanyards.com
Topboutique 1MM Soft Black Elastic Cord for Sewing Face Masks, 1MM x 108 Yards Round Thin Elastic String Rope for Beading and Jewelry Making (1MM, 100M Black) - Walmart.com
Thin black elastic cord 1mm - Jasmin Studio Crafts