Belt keepers
You might like to put belt loops on your dress at the side seam if your dress has a belt. Worked loops are fun to make.
Blanket stitch waistline
1. Use matching double thread.
2. Hold the belt in place on dress and loop thread back and forth across it three or four times. Take a knot stitch each time you sew into fabric.
3. Remove the belt.
4. Work across the threads with blanket stitch. Keep stitches close together.
Select a belt for your dress at your local store or have one made to match your dress. You will learn to make belts when you have had more experience in sewing.