Wow Air operates four 174-seat A320 aircraft in an all-economy layout, with a seat pitch of 30-31 inches, a little more than usual for a budget carrier.
The configuration is 3-3 (A,B,C - D,E,F).
If you want to enjoy the scenic views of Iceland pick a window seat (F) on the right hand side in rows 1-10 and 18-29. Travellers in rows 11-13 will get extra space as these are emergency exit rows, but views here will be obscured. Passengers can pick their preferred seat at a fee of £5.