Elegant dress for a wedding or special occasions, size 3

This is a fantastic dress. It is so pretty! I love it but I have no occasion to wear it. I am in the between size 2 and 4. This dress fits me perfectly but I believe it fits also a bigger size as you can fix it on the back in based of your size. See pictures for details. It is new. Please pay attention. I added size 4 on the description because the website it doesn’t give me the option to add size 3 which is the size on the dress. Never used. Tag has been removed