You can choose the material from Yellow gold, White gold, Pink gold with a diamond.
The number of characters are up to ten. Size 6-8mm x 20-30mm depends on the number of characters.
You can make an only one pendant for yourself or a gift for..... !
Order through amazon.jp or Rakuten Global to get direct from Japan.
Or first time to Rakuten Global refer
But maybe not needed because it's easy to do.