rather well 52

In the end, as stated (26 square 16x16cm), the assembled everything roughly speaking 80cm².
For my part I took 2 so that baby can still sit on it and do a few pints rev buttocks without ending up on the floor.
And I do not regret. I probably would complete later by a 3rd to cover a more suitable surface.

Apart from the size of the set, the size of each square remains quite small. Baby has no trouble disassemble everything, which can be problematic if you contiez like me serve you as "carpet". I think it's better simaginer this lot as a foam toy for baby because the carpet quickly ^^ becomes a battlefield.
Otherwise, 6 of these small squares can form a small cube in which baby likes to poke her hands to pick up the letter fell inside.
The small squares semboîtent fine, but do not take a lot to each other. Just make a baby backs on it to turn it comes off a bit.

Suffice to say that my 1 year old baby Fun with is what makes me give this rather good note.

Last thing, my cat remained totally indifferent to this matter, he did not make the top and claws have arisen over that 1 time (I was afraid seeing some reviews, however it s' went well).

So finally I would not recommend it as a carpet (although it had already written off 2 or 3 "falls"), but rather as a playful and technical game.