Classic Italian linen coat dress with a V neck, and 3/4 sleeves that can be rolled up with the button tab. It is lightly gathered across the back.
This particular colour is only available in the Small/Medium size. It is very roomy, and easily suits size 16 and under. I wear one myself... love it as either a dress, or a jacket.
Photographed here in the sage green, the dusty rose is a warm shade of pink, darker than our Antique Rose.