Bonding Squares What are bonding squares? Bonding squares are provided to mums whose babies are in a neonatal unit. Each mum is given two squares, one is kept with baby & one is kept on mums body, every 12 hours they are swapped.... They help mum & baby to bond by smell in cases where they can't physically touch. We are always in need of these squares & they are simply 5 inches x 5 inches in any colour.