Count equal results from DB, how?

[eluser]asppp[/eluser]
Hello fellow CI's.

I have a DB table that has different clothes sizes for different customers.

Let's say I have a table called T-shirts, and every row in the table have the users ID, and a size, let's say "M" (Medium).

What I want to do is to display all of the sizes in a html table, and then count how many of that exact size there is.

like:

S - 5
M - 13
L - 8
XL - 7
XXL - 4

How do I do that?

Thanks