The dress is adorable however I would not say the dress is true to size. I bought 18-24 months and 0-3 months based off the size chart. Our 26 month old is 26 lbs. Based off that & her height, 18-24 month would be the appropriate size & that is the same situation with our almost 3 month old. I should have sized up and not followed the chart. We have family pictures on Sunday and now the 3-6 month is completely sold out.