The impression would be changed by pushing it on.
MIZUSHIMA Stamp bow not
MIZUSHIMA Stamp bow not is a stamp.
This is a stamp of the bow knot.
When you pushing it on, you see this.
You can change the impression into polite one by pushing it on a simple envelope.
Pushing it on a paper edge makes the impression cute.
You can also choose the color of ink so that the impression can be changed.