more recent drawings of this pair: a chinchilla(me) and a chipmunk( doggables)
these scales are more accurate. the chipmunk really would not be much compared to his body, even if he is a particularly small chinchilla (and he is). She's able to fit her whole body in his hoodie pocket!
and she likes to wiggle around underneath his hoodie, against his fur, too.

Also, he's a pet chinchilla, and she's a wild chipmunk - but it's easy for him to hide his friend in his cage with him. she visits him quite freely. He's kept alone because other chinchillas bully him... so he could use the company