Finances permitting I always try to fly business class on any long haul night flight, rather than subjecting geriatric joints to 8 hours in an S shape. I have discovered a unifying factor with BA, Qatar, Etihad and Emirates, they all have pillows that are more appropriate for hamster bedding than 4.5kg of human head. This is slightly smaller than a regular pillow, is easily accomodated in hand luggage, and is now my favourite travel companion, after She Who Must be Obeyed of course ( who may well read this review and is marginally less forgiving than the Inquisition ). At £8 it is excellent quality and far more effective than the bizarre neck pillow things.
I broke my neck when I was a teenager so sleeping has been uncomfortable for 30 yrs. Memory foam was not a good option for me as it is warming and I suffer from night sweats. The bamboo on these pillows means they stay cool all night. Each side of the pillow has a high side for those with a bigger head and a small side for those who are more petit. Since I started using these pillows, I have not had any aches or pains around my neck area. They are great!