I've got a Siamese-Ragdoll cross kitty named Scarlet who is about 2 years old, and a long-haired Chihuahua named Haru who is 4. They're both super sweet little animals, and they get along very well! I'm no more of a cat person than I am a dog person, though. I love them both equally.
When we first got Scarlet she was tiny enough to fit into a small whipped cream container. I used to have a pic of her sleeping inside one but I can't find it anymore. Since then she's grown to be really big! She used to love sleeping on my laptop keyboard and she would fit across it perfectly; she still tries to do so now but half her body flops off the edge, haha. She's a sweet kitty though, and she purrs a lot. I don't think I've ever known a cat who purrs as loudly & as often as she does.
Haru, too, used to be small but has grown to be pretty big for a Chihuahua. He's a little smaller than Scarlet, though. He has the typical yappy traits associated with his breed, and he isn't very friendly to strangers, but he always seems to know when I'm not feeling well and snuggles with me. Just having him around makes me feel a lot better when I'm down.