Final answer:
The weight increments for Alaskan King Crab Legs Appetizer can vary, and they are typically prepared by steaming or boiling.
Step-by-step explanation:
The weight increments you can order Alaskan King Crab Legs Appetizer depend on the restaurant or seafood supplier. However, common weight options for this appetizer are typically a pound or half a pound. It is important to note that the weight of the crab legs may vary slightly due to natural variations in size and weight of the crabs.
As for preparation, Alaskan King Crab Legs are usually steamed or boiled. They can be served with melted butter and lemon wedges for dipping. Some restaurants also offer different seasoning options such as garlic butter or Cajun spices.