Who has the widest seats?

Which airline, which manufacturer, which frame offers the widest 1st class seats?

Have a look at Douglas DC-10 , as offered in http://www.boeing.com/commercial/airports/acaps/dc10sec2.pdf page 17. They offer 54 inch seat pairs and 31 inch aisles.

On MD-11 http://www.boeing.com/commercial/airports/acaps/md11sec2.pdf page 13 you will find 57 inch seat pairs (specified as 2 21,5 inch seatbacks of 43 inches and 14 inches for 8 inch centre armrest, 2 3 inch side rests) with 26,5 inch aisles.

Looks like Mcdonnell figured out 1st Class prefers wider seats, less space wasted to aisles

Boeing 787 : See http://www.boeing.com/commercial/airports/acaps/787sec2.pdf page 9. You can get 57 inch seat pairs into a Dreamliner, too, if you accept 22 inch for aisles. Boeing, however, specifies 21 inch seatbacks – presumably 15 inches for armrests.

Boeing 767 : See http://www.boeing.com/commercial/airports/acaps/767sec2.pdf page 25. You can get 2 57 inch seat pairs and a solo 29 inch seat in by leaving 21 inch aisles.

You don´t even need a widebody. Regarding the Boeing 737, see:
http://www.boeing.com/commercial/airports/acaps/737sec2.pdf , page 56. Still 57 inch seatpairs – and seatbacks are specified as 22,0 inch each.

Boeing 777 has 1st class seats no wider than 787: 3 57 inch pairs, specified as 2 21′ seatbacks like 787 and 15′ for 8′ centre armrest, 3,5′ side armrests. All the extra space goes to make aisles 29′ wide. See http://www.boeing.com/commercial/airports/acaps/777rsec2.pdf page 13.

Boeing 747: See http://www.boeing.com/commercial/airports/acaps/7474sec2.pdf page 29. The same 57 inch seat pairs. Extra space goes to make aisles 34 inch wide.

Airbus A380 See http://www.content.airbusworld.com/SITES/Technical_Data/docs/AC/DATA_CONSULT/AC_A380.pdf page 31. Still the same 57 inch seats – all extra space goes to 38 inch aisles.

Are there any better seats around?

Boeing is the only one to show 4 abreast in their 787 description – specifying 30′ aisles. They do not specify seat width, but it computes as about 39′.

But 4 abreast 1st Class is pretty popular actually on many A340 and B777 operators. And JAL has 3 abreast Skysleeper Solo on 777.

But from pictures, the aisles and armrests look big. Which airline actually offers the widest beds, as opposed to space spent elsewhere?