Here are a few options, staying under 50 characters:

1. Womens Summer Mini A-Line Lantern Tie Sq Neck Dress (43 chars)
2. Summer Mini Dress Lantern Sq Neck Tie Dbl Hem (44 chars)
3. Womens Summer Mini Lantern Tie Front Sq Neck Dress (42 chars)

The first option, “Womens Summer Mini A-Line Lantern Tie Sq Neck Dress,” covers many key features clearly and concisely.