What size are the 2002 VW Polo 1.2S 3 Door, Front Door Speakers?

PLUS, Are They Any Good And Will These Fit??? Please Help! Thank You!

http://cgi.ebay.co.uk/NEW-PAIR-450-WATT-6-5-3-WAY-CAR-STEREO-AUDIO-2-SPEAKERS_W0QQitemZ380112082512QQcmdZViewItemQQptZUK_Audio_TV_Electronics_In_Car_Entertainment_GPS_Car_Speakers_PP?hash=item380112082512&_trksid=p3286.c0.m14&_trkparms=72%3A1683%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318
Sadlly I have Blown The Original Ones And Want A Cheap Way Of Getting Good Sound Without A Sub And Amp...