Guys, I am having a hard time finding them. Do you know any shop on line in EU?

They don't have to be big. I am using it to mount a tweeter in a self-made speaker, so I will of course have to cut it as needed, but can't be thicker than 1mm.

Thank you!

1mm styrofoam? Surely that wouldn't hold a tweeter, or anything much. If you want 1mm solid polystyrene, that's easier to find.

Peter

Go to your butcher shop in the local grocery store. The trays the meat is sold in should work. They'll most likely give you one.

A do it your self'r will breakout the hot wire and slice off the needed piece.

Or maybe styrofoam plates.

Thank you.
I need 1.0mm because it will just serve as thin layer between tweeter and wooden case, so sorry for not being clear. Your recommendation above do help!

I found this at modelshop.co.uk, which is what I was looking for: http://www.modelshop.co.uk/styrofoam-blue-1-x-330-x-580mm-4718-p.asp