Not sure how this would look in the back. Maybe try it on an old pair of jeans to see. Pants don't fit right in the waist? This super simple trick actually helps finally get you the perfect fit.
DIY Refashion T-shirt to a Workout Headband diy t-shirt diy fashion diy refashion diy clothes diy ideas diy crafts diy headband diy accessories
How to Take in your Jeans Waist - Step by Step Tutorial (this one is actually done 'correctly' at the waistband, instead of the lazy way)
Montessori type in French
Here are 25 Beginner Sewing Projects that you can try. Perfect easy sewing patterns for beginners.