There are photos of my two youngest boys that look like this. E is 4 years and 1 month exactly older than G. E was a teeny 4 year old, like 5th percentile teeny. G was a big baby and toddler. There was not that much difference in their size once G was like 9 months old. But E still wanted to hold him and would even "carry" him sometimes. It was really adorable!