Difficulty Level:  Intermediate
 
This item is made-to-measure.  It was tested by testers with chest sizes ranging from 28 - 56 inches; however; it can be made smaller or larger. 
 
Any DK yarn of choice (weight 3)
I used Hobbii Friends 8/8 Cotton; however; a yarn that stretches is recommended for fitted shirts and tank tops. 
Hobbii “Flash It!”: Gold as an accent between ripples (optional) 
The recommended hook size for your yarn
I used a 4mm hook.
Measuring Tape
Scissors
Stitch Markers
Calculator (optional)
Blocking equipment (optional but highly recommended)