According to the article "Breathtaking Sculptures Made Out of A Single Paper Sheet" (in which the images are taken from) :
Peter Callesen is artist born in Denmark who works with white paper in different objects, paper cuts, installations and performances. Most of his works are made from A4 paper sheets. He makes various sculptures from white paper. His precision transforms ordinary piece of paper into a masterpiece. His sculptures are sold for about $4.000.
“By taking away all the information and starting from scratch using the blank white A4 paper sheet for my creations, I feel I have found a material that we are all able to relate to, and at the same time the A4 paper sheet is neutral and open to fill with different meaning. The thin white paper gives the paper sculptures a frailty that underlines the tragic and romantic theme of my works.”, says Peter Callesen who creates paper sculptures by cutting them out of paper with scalpel.
Pictures below are taken from the artist's website: