Vaccum hoses...need HELP
 

Hello again to all,
Recently my wife asked me to changed all of the vaccum hoses in our S80 2.0T 2001. I called and asked the dealer but they were not to helpful as they want me to bring the car over which is very far away from our home. I went to a workshop nearby my working place...they have these sizes available 4mm, 6mm, 8mm and 10mm i think. Could someone be kind enough to tell me what sizes m i looking for so that i could DIY over the weekend. BTW i have attached the picture for your kind reference. Many thanks in advance.