This pencil holder is made of first 500 digits of Pi (actually 546 exactly), the numbers are disposed along a spiral path to create a nice pattern. As you can see from the photos, the printing (Black Strong &Flexible) is very delicate and detailed. This desk accessory is both useful and decorative.
This pen holder is available in two other sizes :
large : Pi Pen Holder large
and medium : Pi Pen Holder medium