NWT Flavio Castellani Rhinestone Button Cardigan Wool Blend Size 40=4

NWT is a Flavio Castellani wool blend cardigan. Long sleeve Crewneck Cardigan Ribbed waistband & Sleeve cuffs Rhinestone buttons up front Size chart for this brand says size 40 is equivalent to a 4 in US. This seems larger than a 4 see measurements. Size 40 Chest 17” Length 23”