Hi Areinu, that's a sum of 2 tiles!
Hope it helps, comment again if you need ;)
Viewing post in Modern interiors - RPG Tileset [16X16] comments
I wasn't very specific, I wanted to do it with no wall, with a curve and no unnecessary line cuts:
But since it's just straight lines I managed to draw it myself, more or less. I have also drawn myself second version which has additional line separating bottom-going wall, like on the version you've made.