The first stitch is a single herringbone and then filled in the curve with closed herringbone making bigger stitches on the outside curve. I suggest you draw the shape/curve you want onto the fabric. It is quick and easy to do and can be used 'as is' or add extra stitches and beads for a CQ block.
Badass Cross Stitch — Week 31 of the #YearOfStitch : Badass Star Stitch
515 - Basket of Gold - The Embroiderers' Guild of America