95b323b7_of_Size__Policies___Yahoo_News__Stated_policy
[Airline] Spirit [Costs] Passengers that do not anticipate fitting in the roughly 17 between armrests might like to preemptively purchase one of Spirits Big Front Seats, with 18.5 width and 36 pitch six extra inches of legroom. N/A [Stated policy] 
No publicized policy.
Airline "Customer of Size" Policies - Yahoo News
Stated policy