Fifteen and a half sun block.
4 seconds sound clip from the Home Alone 2: Lost in New York movie soundboard.
You can hear this line at 00:02:14 in the Blu-ray version of the movie.
Quote context
[...]
- Hey, Rod, do they have nude beaches in Florida?
- Where are my magazines? I'm sure I left them here somewhere.
- Leslie, what'd you do with my gol-darn golf balls?
- Fifteen and a half sun block.
- Father, could I get a string bikini in Florida?
- Make sure you pack your beach towel.
- Nobody can order pizza in this house.
- You know why? 'Cause I'm the only guy...
[...]