Australian mice are rather large, you know?
2 seconds sound clip from Snagglepuss - Fight Frigt (S2E2).
You can hear this line at 00:02:25.045 in the Blu-ray version of the episode.
Quote context
[...]
- Sir, you're talkin' to a lion. Who do I have to fight? Who do I have to fight?
- Ten bucks just to fight a mouse?
- Sir, are you pullin' my leg? Arm, even?
- Australian mice are rather large, you know?
- Heavens to Lilliput! How large can a mouse get?
- Then you're hired, if you don't chicken out.
- I repeat, I'm a lion! There are no feathers on me!
- Ladies and gentlemen, in this corner, I give ya Snagglepuss the lion-hearted.
[...]