Vintage 70s Landmark Retro Abstract Tribal and similar items

Landmark 70s shift dress in retro absract print in green, blue and black. Half button front with loop and fabric covered buttons and a modesty panel in the back. Band collar. Lace trim. No fabric content tag but it feels like a lighter weight polyester. Tag size 14.5 but featured on my size medium dress form where there is a little bit of wiggle room. Laying flat measures 41 inches shoulder to hem, 19 inches armpit to armpit and 18 inches straight across the waist. There is a repair near the hem at the seam that really isn?t noticeable unless you look at it from the underside. See photos. Based on these measurements, I think it is closer to a modern size, medium or large, and I am listing it as such. Please double check measurements to ensure the proper fit for you.