In general, we do not have a size chart as we carry hundreds of brands that vary in size.
For SpearmintLOVE products, we do not have a weight/size chart, but we typically recommend going up one size from what your little one normally wears. So, if they usually wear 0-3M, we would recommend the 3-6M and so on. Our newborn size would work well if your newborn is about 8lbs or less and you want it to fit well as a coming home outfit or for a first photoshoot.
Please note that our Waffle Collection is 100% Organic Cotton, therefore, we recommend leaving additional room for shrinkage that may occur on the first wash.