Hi,
For the turbo hoses I used 50 - 70mm, get the 1/2" wide ones:
55mm-70mm Silicone Hose Clips Stainless Steel x1 | eBay
You could use that size for all of them, but I feel that the 90degree bend joint with the EGR needs a 'T'Bolt clamp as that is where oil fumes from the turbo tend to gather and seep through, eventually dripping off. A 'Jubilee' is not able to be tightened enough without overloading it. 'T'Bolts need to be more accurately sized as they have a smaller range.
So I used this 64 -67mm one:
eBay - The UK's Online Marketplace
For the air intake corrugated hose you need bigger 60 - 80mm ones:
eBay - The UK's Online Marketplace
Hope that helps.
Singvogel.

[Thanks for the info it alway good to get advice from someone who has done the job before thanks ]