Should be a 24F, which is a very common and pretty cheap size. We have a 2010 Sienna and a 2012 Camry each running 24F - an Everstart Maxx and a SuperStart, respectively. Any reasonable option should be good for 4+ years, probably more (I replaced the Camry's OEM battery this winter out of an abundance of caution, but it still started fine after 8 years).