Are all chairs the same? I mean is there chairs wider than other? ( like business class in airplanes) if so? what row are their? and can i purchase prearranged seat for them? Thank you

All chairs are same size but there are a few that are in separate pairs. It allows for a wheelchair to fit and sit with u. But the chairs themselves are all the same size (which ARE oversized seats compared to a few years back)

The seats are all the same size, but tickets should be bought in advance

The seat are not the same in the back. Sometimes the two seaters can be separate in the back row. The seat are wide enough. And yes you can preorder you seats

All chairs are the same size.