Show off your inner-maths nerd with this pi necklace. It’s the perfect accessory for Pi Day, or any other day, for that matter.

This necklace is laser cut from one piece of 3mm acrylic and measures about 2.7cm wide x 2.3cm tall. The Pi pendant comes with a free 18" silver plated necklace chain or 18" adjustable black cord, and a CrankyBot gift bag.