validates :width, :presence => true, :numericality => true, :natural_number => true
validates :height, :presence => true, :numericality => true, :natural_number => true
validates :quotes, :length => {:maximum => 15}, :quotes_even => true
validates :width, :presence => true, :numericality => true, :natural_number => true
validates :height, :presence => true, :numericality => true, :natural_number => true
validates :quotes, :length => {:maximum => 15}, :quotes_even => true