Ooooh! This is Celtic Spiral is a pretty one. Stands alone or create a pattern or border.

Celtic Spirals. These take longer to make than I'd like. 😕
*** Small on 1/4" round stock, actual 5.3x5.7mm.
*** Medium on 3/8" round stock,, actual 8x9.mm.
*** Large on 1/2" round stock, actual 10.65x11.5mm.
*** I've included some set choices.
I'm calling the spirals clockwise and counterclockwise. This considering you're starting drawing from the middle outwards.
So shown in the photos, the large is counter, medium clockwise, small counter. Hope that makes sense.

Shanks are all a bit less than 3 inches (~75mm).
***********************************
Remember you are buying the tool, not the impression. When I mention left or right I am referring to the tool/stamp itself.
Reasonable stampers. Be sure that first hit "sets" it.
These are sawed, filed and engraved by me.
They may each be a little different, as I make one for you special.
Hardened and then tempered tool steel. Rockwell hardness batch tested.

INTERNATIONAL: If you choose more than 3 or 4 stamps, shipping weight may be greater than 8 ounces and I'll need to invoice you for the extra postage. Thanks. I wanted to offer the multiple stamp deal regardless.