Composition: Cotton Polyester Blend The package includes 6 pieces. Size tags are in European standard. Please see the size chart available in the product photos. * 2 pcs S/M - 2 pcs L/XL - 2 pcs 2XL/3XL To accommodate your US customers and align with European sizing standards, you can make the following adjustments: * For US customers who typically wear XS-S, you can provide them with Europe S-M size. * For US customers who usually wear M-L, you can offer them Europe L-XL size. * For US customers who typically wear XL, you can provide them with Europe 2L-3L size. By providing one size up based on the European standards, you can ensure that your US customers receive the appropriate equivalent size.