Is my logo good enough for printing?

Short answer: It depends on the format. An SVG always is: the sheet shows a green line and no measurement at all. For a PNG, the sheet displays its dimensions in pixels and its resolution — in red, the file is not good enough.

If you uploaded an SVG

There is nothing to check. Vector artwork has no fixed dimensions: we re-render it at the exact size of each marking. The logo's detail sheet announces it with a green line: “Vector file (SVG): optimal print quality at any size”.

Two caveats all the same:

Check the preview. Vector guarantees the resolution, not the fidelity: what goes to print is the PNG produced by the conversion. An orange message invites you to check it — see What file format should my logo be.
An SVG that contains a bitmap image does not get that guarantee. The sheet says so plainly, and applies the same minimums to that image as it would to a PNG — see My file is an SVG or a PDF but you say it is not vector.

If you uploaded a PNG

Two values matter, and they are independent of each other:

	Minimum for good-quality printing
Resolution	300 dpi
Dimensions	4000 px on the longest side, transparent margins included

A 72 dpi logo is enough to build the shop and see the result on screen — but not to produce the marking.

You can absolutely build your shop with a web-quality logo and supply the print file later on. See I do not have my final logo yet, can I start.

Going further

You'll know it worked when: The logo's detail sheet shows no value and no message in red.