This question is actually a very valid question. According to our factory’s experience, we usually see these sizes:  A4: 210*285mm; B4:260*190mm; A5: 210*143mm; B5: 130*190mm; A6: 105*143mm; B6:90*130mm.

The sizes provided above have a nice width to height ratio and leads to a more visually appeasing product. From another perspective, it actually decreases the customer’s cost; it will be easier for the factories to cut the paper and greatly increase the efficiency of production. Our Shenzhen instruction sheet factory will recommend that designers and packaging engineers in designing the instruction sheet to also consider whether or not the size and dimensions of the product will actually fit in printing’s basic requirements.