Amazon.com: 2 Pack 2 mm 5/64 Inch Elastic Cord Stretch String, SourceTon Elastic Beading Cord (Black & White, 55 Yard), Great for Crafts, Hair Ties and Home Uses
Elastic Cord for Hair Ties in Black White Pink Yellow Orange Brown Blue Purple Green Silver Gold - 3mm Round Elastic - The Heyday Shop
10 Meters Elastic Cord Stretch Thread String 3mm For Sewing Hair Band Crafts - Jewelry Findings & Components - AliExpress