I was looking for a non-tuxedo, non-satin, non-gown, non-shine, non-brilliant white, non-summery outfit for my DS's baptism and this was the PERFECT fit. The quality and the fit are very nice. I bought the 3-6 months and it fit perfectly. I decided to trust the sizing instructions. His chest measured 17 inches. I should add that my DS was 3 months and approximately 15 lbs. I would recommend this for any parent who has the same list of "non" that I had.