Ganesha is depicted here in a unique art form, batik, which involves a continuous process of dying and waxing. This unique image is so because of the attributes the god holds in his hands. Instead of the commonly depicted ankusha and the pasa, he holds a 'padma' and a 'shankha'. The lotus bud is said to have come from the brilliance of Varuna. The lotus can also become a weapon. The 'Mudgalpurana' narrates that Lord Ganesha threw his lotus at the demon of ego, Mamasura who could not bear its fragrance and surrendered himself to Ganesha. In the other hand, he holds the conch which is said to have belonged to Lord Vishnu. In the lower left hand, he holds a tray of modakas, a sweet eat, of which he is obviously so fond of protection.
Ganesha's body is of gigantic proportions. It is paradoxical that with such a massive body, Ganapati should have chosen the tiny mouse as his vehicle. It is mostly associated with material desire and the Lord seems to have subjugated this mouse of desire at his feet.
This description by Kiranjyot.