Silver Belle Dress for Girls

The Silver Belle dress arrived yesterday for my DD. She LOVED the dress. The only problem is that it's very long on her. She said that she "will grow into it" and doesn't want to return it. I understand this dress is supposed to be calf length. It literally hits her ankles. The top fits fine, it's just the length. I'm hoping she'll grow a little before Christmas. I could order the dress in a size 8 and see how that one fits or just suck it up and keep the one that I have and not worry about it. It looks like a ball gown on her and she's not bothered by the length.

ETA - I ordered a size 10 in the dress. She's a size 8 but sometimes wears a size 10 depending.