DIY project for your smart phone
But why buy them when you can make them yourself?
To create a dashed line effect, hand stitch in and out around the leather/vinyl through the poked holes. To fill in the unstitched areas, hand stitch in the same approach. Make sure to overlap about 3 stitches to keep the stitches secure.
Fold over the left and right triangle flaps. Sew together and make sure the 4 poked holes are aligned. Put e6000 glue to the bottom flap, insert inside, and glue on place. Hold for a few seconds to allow glue to set in and dry.