Yes, you can!. There is no option for selecting grommets online, but you can place your foam core sign order and enter a note that you want to add grommets with all the specs (ie: all 4 corners, 2 corners only, color of the grommets) in the "Got Comments" comments section (found on file upload screen - see visual below), and one of our 4OVER4.COM reps will add that option to your order and advise you as to the additional cost.