What is "cardboards"

Usage examples of "cardboards".

Are you pissed of because we're not there on the sidelines 24/7 holding balloons and sheets of twenty-four-by-thirty-six cardboards with Bible quotes?

We had no pads of paper, but my father offered up the stack of grey cardboards he had been saving from when his shirts were sent to the laundry.

With satisfaction he selected cardboards and canvases, repaired some stretchers that had come loose at the corners, gathered together brushes and painting materials of all kinds, and equipped himself as though for a short trip, even making ready his full tobacco pouch, pipe and lighter, in the manner of a tourist who is planning to climb a mountain in the morning and knows of no better way of spending the expectant hours before bedtime than to think lovingly of the day to come and to make ready every little thing he will need.

There were old deposit slips, shirt cardboards, programs, menus, even two match covers.

Lydia had hand-painted two shirt cardboards, "Gentlemen" and "Ladies".

On one of the cardboards Pierre had written "Power over ambush" and on the other "Black".