Levi's Boys' 510 Skinny Fit Everyday Performance Jeans in Blue are designed for boys in size 5. Made of polyester, cotton, and elastane denim, these jeans feature a zip and button closure, a 19-inch inseam, and are machine washable. With a regular fit and suitable for various occasions like travel, activewear, and casual wear, these Levi's jeans are a versatile choice for boys.