I adopt my cat, Chi, when she is still 2 months. Now, she is 10 month.
The cattery said that she is a Maine Coon, but I'm not pretty sure to that since Chi doesn't have a certificate, so I don't know her family tree.
Some people also told me that she's more like a Persian.
I love the name Chi! How pretty and creative! Well, she came from a cattery and she is clearly a Maine Coon cat. Although, with those big round eyes I can see why some folks might think she has a 'Persian' look as well.
Her breeder told you she was a Maine Coon, and she came from a cattery. Her ear tufts do not lie! Chi is a Maine Coon cat.
But, since you didn't get any paperwork I'm not sure the extent of her lineage. Could there be a Persian somewhere? Maybe. She should have a pedigree, and be registered. Our article on Maine Coon breeders talks a little more in detail about what kind of cattery one might find.