The Sun Dancer Relaxed Shirt by Alémais. 

Oversized shirt silhouette, Camp collar, Front placket with tab closures and self-covered buttons, Turn up cuffs with tab closure detail, Button and tab at base of back yoke, Side splits This design promotes a comfortable and relaxed fit, facilitating ease of movement while enhancing breathability.

Model height is 5’10.5in/179cm, Bust: 81cm/32in, Waist: 61cm/24in, Hip: 88cm/34.5in, and wears a size AU6