Hard Material: SONNLYH clipboard is made of high quality acrylic which is smoother and harder than ordinary plastic but isn't fragile, besides it will not be scratched as easily as plastic. The thickness of 3mm is firm and isnt bend either that is enough to help you stand up and write or draw.A4 Size & Round Corner: 12.2"L x 8.6"W, 1/8"Thickness, suitable for Standard A4 size. The rounded corners do not hurt your hands and are easy to carry. Most backpacks can hold it.Strong Clip: There is no need to worry about not being able to hold the paper. The golden clip made of stainless steel is not only stylish, but the most important thing is that it has a very strong clamping force, which can hold up to 80 sheets of paper.Retractable Hook: Our clean clipboard is designed with a retractable hook. When you need to classify the content of the paper, you can hang it on the wall for display, which is especially suitable for office.Package Include: Acrylic clipboard x 2. Its simple and fashionable style design adds school and office learning atmosphere.