Polo 6n1 A/C belt

[Torreno]

Hello, I own a Polo 6n1 1.9d (AEF engine)
Since I bought it, the V-belt was not reaching the compressor, it only went through power steering, water pump and alternator.
I searched the web for a longer belt but the only dimension I could find for the belt was 1220mm

Is there a different belt dimmension for AC cars or do I need something else to fit it so it can also reach the compressor?

Thank you

(Exploded-view diagrams are welcome, as my english regarding mechanical terms it's not good at all)

[JUUL]

My autoparts website says there is an even longer version 1225. Maybe this is the one you need? See below for manufacturer examples:

QUINTON HAZELL QBR51225


MEYLE 050 005 1225


JP GROUP 1118105209


AE MVB1225R5