The wigs that we manufacture can be difficult to put on - this is because I wanted to make them tight enough so that they would not slip off.
The trick is to try to rest the rim of the wig on the front of the head and push down on the back until there is no space left between the wig and top of the head. You may need to pull on the back of the wig to get it in place. Watch the video below and read the rest of the post to make sure you become a ninja at doing this.
Make sure the wig cap does not get crumpled when you do this and that it covers the head properly.