箋
セン, ふだ
paper, label, letter, composition
JLPT0 G7 S14 F5000
As per
戔
# (fine/slight) +
竹
bamboo → fine, inscribed pieces of bamboo → *paper*; *stationery* (← bamboo as a writing medium) → *letter*; *composition*.
[Full Kanji Etymology List]