Trying  

ColoringField

Printing

All three formats print. Which one to reach for depends on what you are doing.

One page, right now
Use the print button on the design itself. The page is set up to print the drawing alone, with everything else removed.
Several pages
Download the PDFs. They carry their own margins, so a batch comes out identical.
A different size
Take the SVG. It scales to any size without going soft.

Paper

Ordinary copier paper is fine for pencils. For felt tips or markers, heavier paper — 120 gsm or more — stops the colour showing through. For paint, use card.

Settings

Print at 100%, not "fit to page", if you want the margins as they were designed. Black and white or greyscale is enough; there is no colour in the file. If the fine lines look grey, turn off any "draft" or "toner save" mode.