My 3-year-old daughter wore this for Shichi-Go-San (a traditional Japanese festival for children). I'm not sure of the size, but it fit my daughter, who is a bit on the larger side for her age, so I think it would be fine for a 3-year-old. It fastens with buttons in the back, and you tie the ribbon yourself. There is a stain on the chest (see image 4). This is a used item that a child wore, so there is some wear and tear, but I think it can still be worn. I will sell this to someone who understands that it is a used item.