Really stunning, and finely done--to my eye this vase is pretty close to a perfect thing. The rich green glaze definitely nods to the matte green of Arts & Crafts era pottery, amid which this vessel would feel quite art home, but the green on this porcelain vessel has more a satin finish, which perfectly complements its rounded form. As nice as is as filled, though I do think a few big white pink peonies would be its ideal completion! 

5" tall x 6 7/8 widest; 1 7/8" across at opening. Excellent condition--no flaws at all that I can see. Its black bottom is a bit of a mystery--I think there was once a black pad adhered to the underside, which left some residue. Through the black the initials KD are visible, but I have not been able to identify the maker.