St Patrick's Heart Tiara One size fits most. Large green heart shaped gem adornments. Side combs for a secure fit. Made of plastic. Show Your Royal Side This St. Patrick's Day Dress to impress during your St. Paddy's Day festivities with the St. Patrick's Day Queen Of Hearts Tiara. Complete your fun and fabulous shamrock look with this too cute tiara. Show your Irish princess spirit this March 17th with adorable St. Pat's accessories your friends and family will love!