While I'm on the 5Bite Diet, I was looking for a way to keep my bites uniform and after doing some research it seems that a Table Spoon is equivalent to a bite of food.
Hence, I sought out a measuring tool which would measure a table spoon scoop style and here's what I ended up getting. (By the way, 5 Bites of food twice a day is approximately 3.72 oz and approximately 500 Calories)