Popatu Little Girls Rose Petti Dress

Got this dress on size 5/6 for my 3 year old because the 2/3 size didnt fit her, that one was suited for a 1 year old. Now this one fits her but sizing doesn't make any sense. My 3 year old weights 35 pounds so she shouldn't be wearing a 5/6 size dress.

First I bought this dress in size 2-3 for my 3 year old , when I received it , it was unbelievably small, I still kept it because I have an 8 month old daughter that will eventually fit into it, this dress in size 2-3 is definitely suited for a 1 year old. So as soon as my youngest start walking she can wear it. I immediately bought another of the SAME dress but size 5-6 for my 3 year old. Now I received it today and yes it fits her but it's not loose or per say big that she can wear it for a couple years as I was thinking, my 3 year old is 35 pounds and regular height so in conclusion this dress run very small. I would size up. It is a beautiful dress though, I cannot wait for my girls to wear it. I just wish I didnt buy the first one. And it's a hassle to return for me that's why I kept it as well. Anyways my youngest always gets all the clothes from my eldest so buying 2 dresses of the exact same style was unnecessary.