Dionaea muscipula 'B52' has long held the throne for the largest VFT cultivar. There are some others out there that are not yet officially named that may challenge that but add in how quickly this plant grows and the deep red mouths and green petioles and this VFT holds it's position as one of the best out there in my opinion.
Since it is a highly sought after plant, it is offered at different sizes unlike the more commonly available flytraps. Photos shown to give an idea of the size to expect, small and medium are shown in 2.25" pot large is shown in 3.5" pot.
Shipped bare root but if you purchase a pot with media I will be happy to pot it up and ship it potted for you, just leave me a note letting me know!