First, you are going to cut two square of fabric that are the same size of your choice. The most common is 3.5 x 3.5. I actually used the Square Scallop Edge Die Cut and the Big Shot from Stampin' Up to cut my squares so they were a little fancier!
Next, you will sew around the outside of the square, probably about 1/2 an inch from the edge. Leave the fourth edge open to fill.
After that, you will use a spoon or funnel to stuff your sachet with dried lavender.
Finally, sew the edges of your sachet shut! Its that easy!