What is the form Param Purush have? Can we get to know it?

He is indescribable. Even one who has sighted Him Can’t give any description. Still, Sahib Kabir has given some hints for the common people to have a bit idea about Him.

Koti Anant Yojan Lau Kaya, Kahan Lug Kahon Tasu Ki Chaya  

You can imagine His body to have a spread up to innumerable Yojans. So to say, He is limitless

Koti Kalap Yug Jaye Sirai, Mukh Anant Se Varni Na Jayi  

It is not possible to give a description of Him even if an attempt is made to speak for Yugas together with innumerable mouths.
Then talking about the forehead he says that if it is taken in a very subtle form, it will appear like innumerable suns and moons. It is not possible to give a description of his brilliance.

Abb Netran Ko Kahon Pramana,  
Mano Anant Bhan Shashi Jana  

Suppose He has eyes as well. Then these can be
taken as innumerable Suns and Moons. It appears as if
billions of lights have put together.

Nasa Roop Kahun Prachanda, Mano Ajj Anant Brahmanda.  

Again, suppose He has nostrils as well. These appear like countless Brahmands from where the strange kind of fragrance is spreading up to many Yojans.

Shravan Roop Main Kahaun Bakhani,  
Anant Sindh Mano Smani  

Suppose He has subtle ears as well. These appear to
have countless seas in them with innumerable Lotus
flowers (having no branches, leaves, roots etc.) blooming
there. It is not easy to describe the beauty of all this.

Abb Mukh Shobha Kahun Bakhani,  
Pind Brahmand Tehi Mahin Samani.  
Nau Shunya Jahan Lug Basa,  
So Mukh Bheeter Keenha Nivasa  

Suppose He has a subtle mouth as well. The entire limit up to the 7 shunyas is to be seen in His mouth.

Purush Roop Ka Barnan Bhai, Barnat Yaney Na Hoye Dithai  

His appearance is indescribable. It is a futile attempt
to describe His beauty.

Purush Shobha Agam Apara, Mukh Anant Nehin Pavey Para  

Even the countless mouths can’t describe His charm.

Chikur Shobha Kahun Bujhai, Koti Ravi Sheesh Rom Lajai  
Kotin Chanda Soor Prakasha, Ek Ek Rom Anant Bhasa  

Again, suppose He has hair. Every pore can put
crores of Suns to insignificance.

Shavet Akar Purush Ko Unga, Phatakvarn Dehi Ko Runga  

He has a white appearance. There is nothing like this
world to be found there.
In the worldly language, that Sahib has the appearance in the form of word and light, .But this word and light are entirely different from those of this world.

Jahan Lug Jeev Boond Hai Bhai,Tako Bhaid Kahaun Samujhai  

Take the countless Souls as droplets, then Param Pu- rush as a mighty ocean of nectar.
This description is based on supposition because that invisible God is of a very rare kind. He has made His appearance from the medium of brilliant white light.