The word for “small” in Spanish is pequeño (masculine) or pequeña (feminine). Use pequeño with masculine nouns (e.g., un pueblo pequeño) and pequeña with feminine nouns (e.g., una casa pequeña). For quantity or amount, poco is typically used (e.g., poco dinero). If you’re describing size before a noun, the forms are usually pequeños/pequeñas in plural or pequeño/pequeña in singular.