This shirtwaist dates from about 1913- 1915. It is made out of taffeta, with a contrast of striped silk, and is typical in construction of bodices of the era. This one isn't lined and has no boning. It would have been worn with a straight skirt of the era (not as flared as early Edwardian skirts were) and a straight tubular corset.
It was part of a day wear outfit for everyday use and has fashionable little "V" collars which fold down at the back
. Its not as high waisted as most shirtwaists of the period, which leads me to believe its most likely to be from around 1913.
Measures: Shoulders 15", Bust 42" (but would fit up to a 40" bust ideally), Waist 32" and length 17".
(Formerly L. Hidic)