纸

Usually

• 一张纸 zhāng one sheet of paper
• 一包纸 bāo one packet of paper
• 一沓纸 dá one stack of paper

Less often

• 一幅纸 fú one width of paper
• 一篇儿纸 piān one sheet of paper
• 那起纸 qǐ that kind of paper
• 一层纸 céng one layer of paper
• 八开纸 kāi eight-mo paper
• 一令纸 lǐng one ream of paper
• 一摞纸 luò one pile of paper
• 对裁纸 cái half-sheet paper
• 一溜纸 liù one row of paper
• 三页纸 yè three sheets of paper

• 一纸公文 zhǐ one official document