I have given the bead amounts you will need for a basic bracelet. Obviously, if you want to make your bracelet wider, you will need more. 5 metres of Elasticity is a rough guide, it should be plenty. Start with about 1 metre of elasticity. If you use more it has a tendency to become knotted. You can always add more if needed, simply by knotting a new length to the end of the previous piece.