A 6 qt. air fryer will fit a 3-4 lb. boneless ham depending on the model. I use 5 lb. boneless ham in this recipe, and it is perfect for my favorite 10-Quart Air Fryer. You just need to make sure there is enough room for the heat to circulate! Take the size of your air fryer into account. If you have a smaller air fryer, you may need to use a smaller ham.