Please, what are the dimensions of the illustrator to create a logo, I put 800 pt x 800 pt , but has

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Please, what are the dimensions of the illustrator to create a logo, I put 800 pt x 800 pt , but has been rejected. Can you give me some information about dimosions and what type of fils i need for exemple …eps cs / ai illustrator cs.
thank you

If you copy all the logos like you did before doesn’t matter any technical requirements you will be rejected by default.