Horizontally challenged
 

I did a research on searchguru about seat widths in business class ( economy class is no question already booking I am already booking 2 seats, if I have luck, armrests are movable, and the seats are conjoined);
Large meaning tall people have their emergency seat, and seat pitch in some business class are nice for them, but what we horizontally challenged people who loves flying are in . Even a simple return flight is a problem, award booking requires luck on Gods level.
Second what I see based on seatguru only 10 Airlines has at least 26" in business class, and a surprise 4 of them are Chinese (CZ,CI,BR,MF), 3 european(SU,IB,BA), 1 singaporean (SQ),korean(OZ),african(KQ) and 0 US. Is that record right a measure between inner sides of armrests? Where are big US/EU airlines ? Only United is the with their short haul embraer with 24". I would expected more wider seats in US.
May I deny the flight and get back money or rebook on a more suitable flight when I cant fit into in business class seat?
Last time this happened to me I was downgraded to economy with a whole row without any service with no compensation. I dont think its right.
In Europe I travel now with high speed trains, but also on those are changing to crappy airline economy budget seats, so I must travel overnight

It's a little unclear, but are you asking if you can cancel the ticket and get a refund if, upon boarding the flight, you find at that point that the seat won't accommodate you?

Also, you mention 26" seat width - is that the minimum you require or are you just noting the widest seat dimensions you could find?

I would get the United 24" E-175 seat independently confirmed. I was posting elsewhere today that the E-175 is a fantastic short-haul airplane, in part because the 1x2 config in F is quite roomy. But that's 3-4" wider than most F seats on E-175's on other airlines, or 9 to 12 inches of total aisle space unless United has some unusually slim seat design (in terms of the total width of the entire seat for a given amount of actual buttspace). In other words, I immediately wonder if Seatguru has it wrong.

Seatguru data is wrong often enough to require great skepticism.

Also, there isn't a good industry standard for seat width the way there is for pitch.

UA's site claims 20" on the E-175 and 24" on the E-170. 24" seems hard to believe.

https://www.united.com/web/en-US/con...5/default.aspx

https://www.united.com/web/en-US/con...0/default.aspx

is my minimum requirement to travel as human if I pay 2-3k€ for a ticket in advance purchase.
I can squeeze into 22" but that's not comfortable (over 4-5 hours), 24" is doable , but 26" or more is ideal for long-haul.
Sadly I can't travel everywhere with Singapore Airlines they have my dream seats (on long-hauls), and VIE is not served by them so I must travel by train either to FRA/ZRH/MXP

I am skeptical about all seat width datas on the internet, if I didn't tried it before. That why ask here.
My longhaul C experience is mainly SQ(many), EK(medium hauls via DXB), TK (IST-SIN), but now I am planning to see US and Caribics , I can get to NYC on SQ without detour via SIN, but from there I dont see any options, maybe somebodz more experienced can help, otherwise I have to choose a cruise ship TATL+Caribics, which is too much time and money

Yes, if they can't accomodate me safely (I can't sit down/squeeze in C class) or downgrade me because of my size am I entitled to deny boarding and refund /compensation for downgrade. I don't know if is there some legal act for non-US disabled people

Can't you check with the airline(s) first?

Actually, you can get to NYC on SQ - on their 5th freedom flight from FRA.

I prefer travel as comfortable as possible, but I am not a sheik to own a boeing777 customized to my needs.

Yes, I know also to GRU - flight via BCN

Checked only one airline has a specific program for specific needs that is Air France Sapfir
Which I need to try out in C.
All others pricing 2x fare+taxes. for two seats