Asplenium Antiquum 12cm - Ø12cm - ↕19cm

It sounds like you are describing an Asplenium Antiquum plant with a pot size of 12cm in diameter and a height of approximately 19cm. Also known as Japanese fern, Asplenium Antiquum is a popular houseplant known for its slender, upright growth and beautiful green leaves. It is a plant that thrives in partial shade and prefers to have the soil constantly slightly moist.