Transparent Gem Size Reference Ruler

Compare displayed gemstone sizes and shapes visually with this transparent jewellery reference ruler.

Compare gemstone sizes during design

• ✅ Preview a stone's apparent size – Printed reference shapes let you compare sizes against a jewellery design.
• ✅ See the design underneath – The transparent ruler can be held over the area you are checking.
• ✅ Compare different reference shapes – The displayed ruler includes round, oval and princess-style guides.

Choose the displayed option required for your project. The printed size guides are visual references, not a gemstone-weight measurement instrument.

Remove the protective film if present before using the reference. Jewellery and gemstones in demonstrations are not included.

Choose a reference option for your jewellery project. Explore more jewellery tools and accessories.