Choose your seed beads with 1mm holes.
Cut 5/6 lengths of cord measuring your wrist measurement plus another 2". Make one another 1" longer.

Knot together all the cords at one end using the longest cord wrapped around the rest.
Check your knot will fit into your end cap and glue it in after trimming off excess thread.

Thread on your mixture of seed beads on each of the strands. 
Once you are happy with your design, repeat the process of knotting your threads together and glue them into the other cord end. 
Attach a jumpring to each cord end and add a lobster clasp to one of these