CAA: Christian Anime Alliance

How big is the size of an MP3 File size?
I'm wondering since I asked on Yahoo Answers where I asked where could find the first opening to Code Geass.
The Best Answer gave me this link http://www.mediafire.com/?4idmnmqvoye where I downloaded it.

It size is 5.06 MB for 3.41 minutes.
Is that normal, since other songs that I have are not that big?

What should I do?

The short answer is: it depends. File size will depend on the song length and signal composition, as well as the quality setting used by whoever did the original compression.

Looking at my own playlist however, the size you quote does not seem excessive, so I wouldn't really bother worrying about it.

you will have mp3's of all different sizes, mainly depending on wether theyre Constant bit rate, or Variable bit rate.

(5.06 * 1 024 * 8) Kbit / 221 s = 187.563439 Kbit/s

The bitrate is 187 Kbit/s, which does seem a bit higher than normal, but not excessively so. My default is 128 Kbit/s in WMA.