I weigh 140lbs, and eat meat probably 2-3 times a week on average. I eat a regular burger probably once every 3 months or so and it usually knocks me on my ass and makes me feel an extreme level of full as well as very tired (I usually have fries and a beer at the same time). A Beyond burger with cheese and fries shocked me with how similar I felt afterwards, I had it around 7p and struggled to stay awake another 3 hours. I even had a similar feeling of still being satiated when I woke up the next morning like I get from eating a big fatty burger.

YMMV! But my 110 lb wife wasn't full after one burger, which is pretty much unheard of for her. Also, my five year old finished hers, which had never happened with even smallish (in and out) burgers.