Windshield wipers

So it was raining here in Arizona this weekend and I need new wipers. At O Riley's they said I needed two different sizes is this true. Mine truck is an 06 dclb

 

they are either 20/21 or 21/22?...i have bought several types over the years and really like the michelin brand at walmart...one is about 15 a set and their better one is about 25 a set.. have one set on the 4runner and one on the taco...seem to work very well...have tried the cheapos and these seem to work better and last longer...

 

21 and 22, but you can use 22 on both sides.

If you still have the OEM frames, just get the replacement rubber parts from the Toyota dealer and enjoy one of the best wipers available.
If someone has already swapped for aftermarket, the Rain-X silicone wipers are great.