Sizes Per. Area Imp Gal. US Gal Litres  
  14 X 25 68' - 4" 285.3 5764 10524 51841  
  16 X 29 79' - 4" 386.4 11793 14162 53612  
  18 X 33 90' - 4" 499.2 15424 18522 70118  
  20 X 36 99' - 4" 612.2 18677 22429 84907  
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