Bought a 5M one of these tother day at Homebase. Bloody wonderful!
They claim it will extend to 11' without 'buckling' and it does more than that. Nice wide blade with big easy to see markings. First 12" has smaller increments for more accurate measuring. Best measuring tape I've ever had.
On the shelf at £9:99 but came up on the till at £14:99. They did it at £9:99 which is a real bargain. If you want one get into Homebase before they realise their mistake.