With only little effort you can quickly upgrade a simple top or T-shirt with this crochet application 
For the crochet motif you need only little time and material. The free instruction from Schachenmayr explains exactly how to crochet the motif with Catania  Denimand crochet hook No. 2.5 .
Click on "Schachenmayr Free Instructions" and you will get the original Schachenmayr instructions in the download.