Depends. Probably 9" drums unless yours has the towing/police/heavy duty package.
Pop off a wheel and measure them, or look for the stamping in the side of the drum.
I will also say Rockauto. If you search retailmenot for the rockauto coupon they always have 5% off. Otherwise let me know I've got a few coupon codes from them in my email.
I just did the entire front suspension in Jennie's Camry with Rockauto parts, Wishbones/Balljoints/TREs/Bushings/end links and complete strut assemblies with no problems. I've got the entire rear suspension (trailing arms, lateral links, all of it) sitting in the dining room. I bet we saved 5-700 dollars over parts store pricing for all of it.
Just watch out on the shipping, they ship from 3 or 4 different warehouses, sometimes it's cheaper to buy the slightly more expensive part if it ships from the same warehouse as the other stuff your ordering. They'll tell you where all the parts are shipping from when you checkout.