They're large, about 12mm. It was difficult to capture in the photos, but they sparkle with iridescent colors, and have plenty of rainbows! Perfect for your handmade projects! 50 yen off for every 2 items, so please take advantage of this opportunity♡ To prevent any issues: As these are natural stones, there may be natural cracks, scratches, chips, and inclusions. ◡̈⃝︎⋆︎* There will inevitably be an error of about plus or minus 0.5mm, so I've written "approximately ○ mm". They are not perfect like artificial glass, so please understand. ◡̈⃝︎⋆︎*