This page explains the continuation of folding instructions of paper Santa Hat from Step 11.
Step 11: Now unfold the bottom edge alone.
Step 12: Make a small mountain fold at the bottom edge as shown below. Also make Pipe fold at the top left and top right edges.
Step 13: Turn round the paper.
Step 14: From left, fold the paper in half just like a cone.
Step 15: Fold the other half over the cone to form a single cone shape.
Step 16: At the bottom edge, unfold the corner and make a small triangle fold on the first leaf alone, so that the white shade would be well visible.
Step 17: After the above step, your design looks like below.
Step 18: Take the bottom and fold it across as below to get the hat shape. Now simple and beautiful hat is ready for the decoration.