formal fall wedding guest dresses choose your normal size or one size up. Fall Wedding Guest Dresses -
Description
Available in our inclusive size range and fit tested on a wide range of body shapes

I'd say this is in the small range

Neck Style = One shoulder
~ Centennial H.S

[DOI] [PubMed] [Google Scholar] 9.Bocquet H, Bagot M, Roujeau JC

Yes, it is made with breathable fabric suitable for warm weather
