Yes, after you click the Resizer's Print button click the "Download" button (under the blue Print button) and you will have the option to download a resized PDF file that you can save and send to your printshop. You can also save it an unsized PNG or SVG.
However, if you're taking it to a print shop, they can probably do the resizing themselves. Though they might charge you less if you've already straightened, cropped and resized your design using the Resizer. In that case, find the largest paper size they have, and set the Resizer to that, using the Advanced settings further down the page where you enter the size.