Pullover straight green shift or beach dress. The scooped neckline is lower at the back. Knee or just above knee length. Short side slits with rounded edges. The fabric is the heavy textured cotton known as barkcloth - green, blue and yellow abstract print. Brand is Campus Fashions - 1960s.
Small - Marked SSW. You'll need to wiggle into it.
Fits bust 84-87 cm (33-34")
Waist to 87 cm (34")
Hips 92 cm (36")
Length 97 cm (38")
Good. There is an old patch on a tear near the hem at the back, not noticeable, and an orange mark at front hip level, as shown.