Delicious chocolate case for phone I turned, make it easy and simple. Remember poufs “Flower”? That they are, but on the other side. This scheme shrinks exactly two times. Based on this, we measure their phone, multiply by two measurements and the devil on the fabric rectangle.
1×1 grid
contractible square 
contract all little corners in the pile. fix string knot
contractible next square
continue until the end
And then came the moment of truth! Overturn and see … chocolate. Flowers are made of the same material and glue. How to make flowers, read
Then sew the bottom and the side seam. The upper edge turns. sew and handle top
Evert on the front side and enjoy the new holster!