10 inch pot full size plant.
 
This philodendron gets huge huge huge!  If you like big rubbery leaves, this is your plant. Philodendron giganteum is a climber and can  grow more than 6 feet long and 3 feet wide under good conditions.
 
Put the plant in medium to bright indirect light; keep out of direct sunlight. In lower light, it will lose some color in the leaves and demonstrate a slowdown in growth. They get bigger faster in semi-bright filtered light. 60% huminity  is the best. They love being misted and it helps them stay fresh and clean.