A well explained tuto with written explanations and pictures. As they say in the tutorial "All you need is an unwanted T-shirt, scissors, and 30 minutes" (as long as your scissors are sharp). Leave your imagination flow and make this easy model better by making knots, adding pearls and beads, mixing coulours... Check some other examples here :
– https://www.3littlegreenwoods.com/crafts/go-team-with-an-upcycled-t-shirt-necklace/
– https://www.etsy.com/listing/505615267/cotton-necklace-fabric-necklace-multi?ref=unav_listing-other-7
https://www.etsy.com/listing/63158887/upcycled-black-and-natural-tshirt?share_id=10377281&hmac=3aa3efe78033c7b578d7286ebde72ce0e1e48055&utm_source=Pinterest&utm_medium=PageTools&utm_campaign=Share
https://www.etsy.com/listing/628040681/knitted-necklaceinfinity-scarf-festival?utm_source=Pinterest&utm_medium=PageTools&utm_campaign=Share&utm_term=so.lp.d2.v1&share_time=1536901551000