noun which may take the genitive case particle 'no', na-adjective, noun
striped; stripes
Describes a pattern of stripes, often used for clothing, animals, or designs. Can function as a noun, no-adjective, or na-adjective.
彼はしましまのシャツを着ている。
He is wearing a striped shirt.
その猫はしましま模様だ。
That cat has a striped pattern.
縞 is a single stripe or a stripe pattern, while しましま is a reduplicated, more colloquial and emphatic form meaning 'striped' or 'full of stripes'.
Reduplication of 縞 (しま, 'stripe'), creating a mimetic-like word for a striped pattern.