0.5mm changes the difference in appearance and size.

This image shows K18YG (18k yellow gold) earrings of different sizes.

I made earrings using 4mm and 4.5mm stones.
The 4.5mm one was an order, and we also had the 4mm stone in stock, so we made it at the same time to deliver it immediately.

The difference is only 0.5mm, but when you line them up like this, it looks like there is a significant difference in size.
If you take a photo of each pair alone, it's hard to tell how much of a difference there is.

In the world of moissanite jewelry, custom-made pieces that can be arranged as desired are now the norm, but we hope this information will be helpful for those who are considering purchasing a piece.