Philodendron Gloriosum leaves are reported to reach a size of 90cm (36 inches) in it’s native growing areas. The plant has a velvet appearance. For your information as the leaves reach maturity the white veins become more pronounced.
When growing philodendron plants, allow the top inch of soil to dry out between watering. Droopy leaves can mean that the plant is getting too much or not enough water. But the leaves recover quickly when you correct the watering schedule.
Set the Philodendron in a location with bright, indirect sunlight. Find a position near a window where the sun’s rays never actually touch the foliage. While it’s normal for older leaves to yellow, if this happens to several leaves at the same time, the plant may be getting too much light.