What is quarter A5?

Quarter A5 typically refers to a specific size of paper that is one-quarter of an A5 sheet. An A5 sheet measures 148 x 210 mm (5.8 x 8.3 inches), so a quarter A5 would be approximately 105 x 148 mm (4.1 x 5.8 inches). This size is often used for smaller printed materials, such as flyers or notepads.