Vintage long sleeve housecoat dress

Excellent vintage condition. Beautiful emerald green housecoat. Long sleeve. Maxi length. Diamond pleating on the front. 30” zipper down the middle. Made in the USA. Fabric is super soft. No fabric content tags. Size tag says small 10/12. (SN: I wear a 10/ large and this fits me). Measures 20” armpit to armpit. Shoulder to hem is 55”. Shoulder seam to cuff is 21”