Does size matter?

Newbie question: how does one know what program size results from a sketch and whether or not it is approaching the size limit for a given arduino board?

If you use the Arduino IDE, it tells you haw big the sketch is, and how much memory is available on the board you are compiling for.

Aah, I see. Read the fine print at the bottom. Thx.

Aah, I see. Read the fine print at the bottom. Thx.

Note that this doesn't tell you anything about memory usage for variables (SRAM) or the EEPROM - only program space (flash).