Hand beaded tops like these take many many weeks to make just one.
fully beaded at front, silk fabric at shoulders and the back of garment is a plain jersey cotton T shirt type fabric.
The top has a draping easy loose fit at back made from solid viscose like light T shirt fabric
A size Large would fit 12 to 14 due to the slouchy cut of the style at the back, more fitted at front. Model wears size 8