This is a lovely antique decanter.
No mark because made before 1936.
You will find this pattern in the 1916 Baccarat's catalog.
Molière pattern (also called Damrémont).
Hight: 31 cm Diameter: 10 cm
PERIOD: 1916 - 1936
Only some white spots inside, near the base.
This is rather discrete and you cant see it when you use the decanter.
Here is a converter inches / cm to help you with the dimensions: