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This wrap is basically a wide, long rectangle, with approximate dimensions of 18" X 72". Mentally break up the wrap into 3 equal sections. In the last third of the wrap, evenly place button holes, approximately 6" apart. You can add or take away space depending on your preferences and choice of buttons. Use any yarn, any hook, and/or any needles.
Start with a foundation single crochet (or chain) equaling your desired length. In the example shown it is 18". Continue in desired stitch pattern for 54", place button hole, continue 6" and place another button hole, continue 6", place last button hole, and finish off wrap with a final 6" of pattern stitches. I placed my button holes approximately 2" from the edge of the fabric.
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Here is a very basic diagram showing the dimensions. Forgive my pathetic Paint skills. LOL! The blue dots represent the button holes. Can't wait to see what you make with it!