Fruit Of The Loommens Big and Tall Tag-free Undershirts

is this more of a regular shirt or undershirt?

What’s the length of these t shirts from front collar to the bottom of the shirt (new; unwashed) in a 2XL?

What's the difference between the s and the s-2x? i need just a regular s size. which to order?

Does it come in 2XT?