A katakana word glossed as “little.” In ordinary description, 小さい is more normal; リトル is often used for a stylish, foreign, child-related, or name-like effect, especially in compounds and titles.
This shop also has little-size children's clothes.
The Little Mermaid is popular with children too.
大きい means “big,” the direct opposite of the smallness that リトル expresses.
Only the katakana form リトル and the gloss “little”; no specific language-of-origin data is supplied, so the borrowing history is not stated here.