These are the largest coals we offer. If you want to make a statement or fill a large fire place, these are the coals for you. Replace your old ceramics or wish to make your fire look new again Gas Fire ceramic square coals Suitable for any Living Flame fire, Gas Fire, Electric Fire, LPG or Natural Gas fires. All are products are made in the UK. Extra large size square Ceramic Coal Size Approx 60 mm/6 cm x 60 mm/6 cm x 60 mm/6 cm