very strong small magnets

The magnets are really very small, have your size but a very good magnetic effect!
The given 6 sheets provide little but just so - the sheets to slide a bit and keep not sooo much, but they keep.

I addition to this magnet nor the 8mm high.
These have a much stronger magnetic effect and keep the 6 sheets without any problems.
In addition, (personal opinion) the almost square design I like better.

The one star I draw from just because it is due to the low "height" extremely difficult to separate the beasts each other.

My recommendation is for a few euros more the 8mm high magnets of the same manufacturer.

Anyone who wants to "attach" a postcard or business card on his glass board can here but safely access!

What you should notice in these magnets is the extreme attraction to each other.
So you should keep some distance between the notes on the board :-)