Roman Numerals work especially well for Italians.
A DECADE . . . is major. Especially if it's the FIRST decade!
To help commemorate a Milestone, just say a year . . . and we can tangibilize its symbol, whether in Roman numerals or not.
In the case of the numeral above, we actually scanned an 8" aluminum "X" . . . that became a "physical" gift – even as the graphic above became the accompanying card.
The cost of a number alone can be as little as $9.95 The cost of a physical 8" aluminum extrusion will be closer to $60.