Not getting enough between the sheets? It could be that you're too big, or that you didn't grow up in the right area. Check out the list, below:
Here are the regions ranked to two decimal places:
1. Wales, 6.56 inches
2. London, 6.51 inches
3. East Anglia, 6.47 inches
4. Scotland, 6.45 inches
5. North West, 6.41 inches
6. Northern Ireland, 6.35 inches
7. North East, 6.33 inches
8. Yorks & Humber, 6.29 inches
9. South East, 6.27 inches
10. West Midlands, 6.26 inches
11. South West, 6.23 inches
12. East Midlands, 6.11 inches