This is a set of 30 sheets of thick paper. A4 size Front: White, Back: Gray thick paper. Thickness: About 4mm for 10 sheets. Would you like to use it for your children's crafts or as packing material? Thank you!(^^)/ *The display of evaluations may change, and it may not be possible to confirm repeat customers in the history. Please let me know if you are a repeat customer.* #Crafts #Handmade #Packing #Cardboard