When we design our baby clothing, we start with concept, work with and test it until we have our finished product, one that allows for extra growing room, comfort and purity for the baby that wears it. We test the fit on real babies, so that the sizes are based on actual age averages which is why our sizing is far larger than the industry standard .. 24 months for us means that it should fit a 2 year old baby, not a 6 month old as is now common sizing practices.