"Windowpane print" refers to a pattern on fabric or clothing that resembles a grid of small squares or rectangles, like the panes on a window. Full definition
Here we see a cute blonde girl who is wearing a peplum white top in windowpane print. (fashiontasty.com)
Same goes with the sheer windowpane print top - paired with skinny black pants and booties, some killer jewelry and even layered with a cardi and you've got a smart, work - appropriate, but not staid, look! (dressedfortime.com)
White windowpane print black sweater looks awesome paired with black leather pants and black pumps: (becomechic.com)