Blades came from every kind of car wipers -european, american, etc etc- so I assume the infos I'm providing can be applied to a large amount of wipers.
What I found out :
Wipers come in three main dimensions :
1) 2,3-2,4 mm width and 0,5 to 0,7 mm thickness
2) 2,7 mm width and 0,7 mm thickness : these are much more difficult to find than the 2,4 ones, I'm still trying to nail down which car brand uses standard wipers with 2,7 width
3) 4,1 mm width 1,1 mm thickness. These are used in vans, single wiper cars, line my old FIAT UNO


Another important thing is the material wiper blades are made of.
They can vary from less-to-more quality steel.
How can we discover the quality of the blade
I use my bending test :

And then I spring it open.
More iron than steel :

The blade remains heavily bent.
More steel than iron :

the blade springs back in its position without bending.
I make picks from steel blades and I usually discard iron ones since they bend much more easily.
Hope this has been helpful.
Peace!
IA