Having purchased such a tablet, I am looking for a leather cover properly sized, otherwise its plastic case becomes too quickly fingerprinted, and it can also fall down inappropriately in some situations unguessable  in advance.

Can anybody give a piece of advice what acceptable offers do exist in relation to the issue?

The covers offered in China, which I saw, had no indications of their dimensions, just mentioning the 7" size, though going not into details that may be important. At the same instance, a purchaser claimed there that e.g. Cube's 7" dimensions were too big for it to be received into the cover properly (with outstanding parts only!). Thus, this comment came too late at least for one purchaser.