Because of this shortage, it's very difficult to buy a face mask now. That's why many people are thinking about making a face mask themselves. 
And it is not difficult at all!
I have prepared for you a pattern and a detailed description of sewing the face mask. It is a pattern with an allowance.

This listing contains 3 PDF files with a patterns in 2 sizes (adult and kids size) and tutorial. If you need a pattern for your head circumference please contact me.

You'll need:
Piece of fabric 30x30cm (11,8 x 11,8")
2 elastic tapes 21cm (8,27")
Scissors
Pencil
Pins
Threads
PDF Reader
Printer and A4 paper
Ruler

If you have any questions feel free to ask!

All designs and instructions are for personal use only, not for resale!