Savage X Fenty Unisex Smoking Jacket NWT belted robe blue green XL (see listing)

I cannot figure Savage X Fenty out. I've bought a few things and the sizes are a mystery to me. But a twist! This one fits perfectly but the colour is way off. The listing says it's "light blue" but it definitely is green - maybe more of a very light turquoise? Seaglass? I only posted a pic from the website because the other pics I have of it make it look powder blue, which it definitely is not. Anyhow, I look terrible in green, so this looks awful on me. But it's a men's/unisex style, so I know it's perfect for someone out there. Size chart in the images.