Air fryers range in size from 1.6 quart (mini or compact) to 10 quarts (large capacity or XXL). We choose to focus on air fryers and excluded multi-function toaster ovens. 1.6 - 2.2 quarts are known as Mini or Compact for 1 person 2.3 - 3.7 quarts are ideal for couples 3.8 - 5.8 quarts are ideal for a family of 3 5.9+ quarts are ideal for a family of 4+ I personally own a Gourmia 7 quart air fryer from Costco that is 1500 watts and love it. I can easily prepare sides and mains for 4 people.