There are 4 options that I know of for mudguards
1) Subaru OEM - smallest, wraps around the most, most stock appearance. Will integrate best into arch moldings if you choose to add those
2) Weathertech- bigger than Subaru, still stockish looking
3) Rally Armor -really flaps, bigger and wider than OEM, a little flappy
4) Rockblokx- similar in style to Rally Armor- a little boxyer (slightly). made of more rigid material.