I have not washed this yet, so I have no idea how the one glittering will hold up but it will work/fits good for my daughters 1 year photos.

With that being said, my daughter is run of the mill 50th percentile and the 6-12 months (at now 10 1/2 months) is almost too tight in length/around the legs. Im glad Im getting her pictures done next week because I doubt this will last til 12 months. With that in mind, I would suggest sizing up or down depending on the size of your kid.