The size guide in the product listing measures the garments laid on a flat surface, meaning when worn the width size would be double its value. This is the size guide directly from the manufacturer’s information.
Please note that in the garment industry, it is common to see a minor variation in garment measurements. It means that there can sometimes be a small deviation (also known as tolerance) from the listed size guide measurements – up to 1 inch (2.54 cm). This type of minor deviation may happen, and the product is not considered to be defective due to that.
The following two images show where the shirts are measured to come up with the measurments in the size guides.