“small” in Japanese is 小, read shou, chii, ko (しょう, ちい, こ, お). It is a Grade 1 Kyōiku kanji, taught in year 1 of Japanese elementary school, and appears in words such as 小学校 (elementary school).
What does 小 mean?
小さい犬だ。
Same sound, different character — the classic trap. Compare them side by side: