Thank you for viewing. This item is: - Brand: Ralph Lauren Sport - Size: M - Color: Navy - Design: V-neck, cable knit - Material: 100% cotton This item was purchased overseas, so the size M is likely larger than a Japanese M. The V-neck is also quite open... I think it would be best to wear it with a camisole or T-shirt underneath, so you don't have to worry about showing too much. Thank you for your consideration.