How to say letter paper/writing paper in Chinese 信纸

小副食店代销邮票、信封和信纸。 ( Small grocery stores sell stamps, envelopes and stationery. )

现在信纸上只有横格儿，没有竖 ( Now there are only horizontal grids on letter paper, not vertical )

把信纸挼成团。 ( Move the stationery into a ball. )