Good morning, it would help if we knew your boot size. A size 11 foot would need a large fin pocket. There is enough adjustment on the heal strap to cover a wide range of feet and booties to boots. Dry suit boots are another problem.
I looked to see where you lived because I have a pair "larges" of what are called Jet style in the garage looking for a new home.
Now if you want to have some fun with the LDS when they show you fins, ask where the "right" fins is, both they showed you are marked "L" for left and you’ll swim in circles :)