This sweater has a knitted body, not crochet. If you wish, as seen in the featured project, you may crochet the entire garment.

From the pattern summary: “BERTA KARAPETYAN HAS CREATED AN UNUSUAL TOP by combining a slim-knitted bodice with a round yoke made from interlocking crocheted rings. The bodice and cap sleeves are worked as separate pieces to the underarm, then shaped raglan-fashion for a few rows. The attached yoke is made from crocheted rings that are linked as they’re worked. A single black stripe crocheted around the edges, along with a crisp picot trim, sets off this simple cotton top.”
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Finished Sizes: 31 (35, 39, 43)” (78.5 89, 99, 109 cm) chest/bust.
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Along with the yarn and hooks specified above, you also need one ball of black Karabella Vintage Cotton (for all sizes), as well as size US 3 (3.25 mm) knitting needles.