Cut the 2 sides of the bracelet to the right length (a standard bracelet is 17 cm long, clasp included).
At each end, place the 4 cords in 10 mm cord pliers (space them evenly) and close the pliers with flat pliers (first one side, then the other, then pinch tightly in the center).
To help you, the 4 cords can be stored together to be pushed into the pliers.
Insert a ring into each pliers and the clasp (simple lobster clasp or more elegant "T" clasp for example), your bracelet is ready!