Custom made scrub caps for surgeons is a REALLY big deal! https://etsy.me/2XJGbTt
Scrub Cap For Long Hair printable pattern comes in PDF format and prints on letter size (8.5" x 11") and A4 paper. You will get a PDF with instructions and pictures, and a link to video instructions.
Make sure you check the right paper size and your printer settings (100% scale of image in particular) when you are about to send the file to printer. If you don't have these capabilities on your home printer, take the file to the nearest copy/print service location (here in US it is FedEx/Kinkos and office supplies stores) and they will help you to print them out.