Whats the size of the on-dash speakers?

[Qube]

Whats the size of the on-dash speakers? (and specs where possible)

[attack eagle]

odd size, not available aftermarket.
SOmewhere between a 2" and 3" closer to 2"

http://www.bimmerboard.com/members/q/original/E34%20front%20dash%20spkr.jpg

pic by q silver.