Silly Silas (Silly Silas) Size: 6-12 months These are loose-fitting leggings. I purchased them from a select shop for overseas children's clothing. They are much roomier than other Silly Silas series, and I think they fit like a size 1-2 years. The waist also has plenty of fabric for a relaxed fit. They fit very loosely on a 1-year-old / 75cm / 10kg child. I bought them a few days ago and only used them once for a photoshoot, so they are in very good condition.