Quantity: 300 sheets Yo-cho 3 (Yo-gata Cho-go 3): This size (dimensions: 235 x 120mm) perfectly fits an A4 sheet (210 x 297mm) folded horizontally into thirds (approx. 100 x 210mm). Pastel White: A gentle white color that gives a soft and tender impression. 100 (100g/m²): This unit indicates the thickness of the envelope paper, meaning it weighs 100 grams per square meter, providing a sturdy thickness. Opaque: A special gray processing (opacity processing) is applied to the inside of the envelope, making the contents difficult to see through (opacity of 99% or more). Kamasa-bari: A sealing method where the envelope flap (the "tail") is sealed on the bottom side (long side), characterized by a trapezoidal shape. Standard Envelope: This size can be sent as a standard postal item as defined by postal regulations. It is sometimes chosen for business announcements and formal direct mail (DM) when you want to balance elegance and privacy protection. #Envelope #Letter