First decide the bags job; as in one for protection.
Then pick the color of the material.
Some believe that it must be natural cloth.
Where others believe if it
is something recycled not trashed; it's is ok to use.
This is your decision or your covens.
Sew a drawstring bag or use a circle piece of material.
Inside put herbs, small charms, crystals, names or whatever you
feel important to the job of the bag.
Many people use the number 3 as in 3 herbs, 3 crystals and/or
whatever
(for the 3 phases of the goddess).
Charms can be used outside to make it look sharp.
However if you like you can place them inside.
Cleanse the crystals and charms
with salt water, sage smoke or light of a full moon.
What you do is your choice.
Tell the bag it's job.
Tie closed.
As in what colors, herbs, and crystals but it is up to
you.