A sheet that allows parents and children to learn Chinese characters from the 4th grade of elementary school in the bath. Simply wet with water and stick to the wall of the bath. Learning bath is highly effective by simply attaching a bath poster. Just look at it! ● Easy to read and read notes ● Writing order by numbers ● Waterproof poster using Yupo paper and special ink that can be used even in bath. The product is A3 size, but it has been folded so that it can be sent in A4 size. Thank you for your understanding. Thickness 244.3 lbs (110 kg) (regular copy paper is about 121.3 lbs (55 kg) for cop