Bed level check 200 x 200 frame

Bed level control 200 x 200 frame (0,8mm x 0,3mm)

Simple frame print, minimal what can Cura to slice, to check bed level after print with calipers on vital bed points.
I wanted to make it with 0,4mm width but you can not slice it in Cura, it worked only with 0,8mm width.