This Fulper vase stands 5.5" high by 4.75" in diameter.  It has a ball form, with a short rolled collar.  It has a nice soft blue glaze, with blue streaks and a grayish blush, finished in a satin matte.  This vase is likely marked, shape number 577.  It feels like the glaze is raised in the base center, so perhaps c1917-23.  It is in factory original condition, with the usual glaze nuances, common to Fulper pots.  This vessel makes a very pleasing presentation.