24" drivers side and 17" passenger side. Be sure to always lookup the exact part numbers for the brand of wipers you decide to purchase by asking the clerk, using the book, or by looking it up online. This not only ensures the correct lengths but also the correct attachments. FYI - there are over 22 wiper arm attachments out there - so its not only length you're buying but also attachment (no wiper blade is 100% universal). See related links below.
http://www.ehow.com/how_4454148_replace-wiper-blades-toyota-corolla.html
The 1993-2001 Toyota Corolla takes 20" driver side and 18" passenger side replacement windshield wiper blades on the front.
The 2001 Toyota Avalon has a V6 engine.
The 2001 Toyota Avalon has 24 valves.
The 2001 Toyota Avalon is a gas-powered vehicle.
The 2001 Toyota Avalon has a 4-speed automatic.
The 2001 Toyota Avalon runs on regular unleaded.
The height of the 2001 Toyota Avalon is 4 ft. 9.7 in. (57.7 in.).
The 2001 Toyota Avalon has double overhead cam (DOHC).
The 2001 Toyota Avalon has a drag coefficient of .28 Cd.
The 2001 Toyota Avalon's turning circle is 37.6 ft..
The curb weight of the 2001 Toyota Avalon is 3417 lbs..