This is BD-1 the buddy droid from the upcoming star wars game Jedi - Fallen Order as seen at EA-Play. Since there are only few references available the dimensions and some details are estimated. Headlength: ~30cm; Height: ~540cm
Happy Printing :)
11.06.19: I uploaded a assembled version for better scaling and included the original fusion360 file so you can change and remix it as much as you want. It would be very cool to see an animated version of that little buddy, but i have no experiences in robots and electronics :/