Edit: At the time I posted this comment, the title of the thread was a "Show HN", now it is no longer a "Show HN". The comments below were made specifically in response to a "Show HN" as helpful advice for the creator.

There's a payment box at the bottom left of the page that says "Test - No Grid" -- maybe this wasn't supposed to be there?

The wording next to the first two options "(Not to scale)" concerns me. Is there a reason you can't draw it to scale?

Or are you just trying to say that it is a scaled down representation?

Usually "not to scale" indicates that a drawing or other representation is a different size than the real object AND individual portions of the representation are not shown with correct proportions. In the case of a design tool, it seems very important that the stamp have proper proportions.

If it is just scaled down but has correct proportions, you would say "to scale" and/or indicate the scale as a fraction of the original size. If it is the exact same size as the actual object, you could indicate that as well.

If it is actually not to scale, what is the point? Any drawing you make in it won't fit in the actual product the same way.