How to read grades
For cupped oysters, grades run from n°5 (smallest) to n°0 (largest): the lower the number, the heavier and plumper the oyster. Grade is a weight, not a quality — small or large, both can be exceptional.
Ostra Regal · Guide
Oyster grade guide: from n°5 to n°0
Understand cupped-oyster grades to choose the right size for your use and number of guests.
- 1
n°5 and n°4 — small
About 30–65 g. Ideal for aperitifs and large gatherings: you eat more of them.
- 2
n°3 — the versatile one
About 66–85 g. The reference tasting grade, most requested in restaurants.
- 3
n°2 — the generous one
About 86–110 g. A fine, plump mouthful for enthusiasts.
- 4
n°1 and n°0 — the large ones
Over 111 g. Spectacular, often reserved for cooking or prestige tables.
- 5
Quantity per person
Count 6–9 oysters as a starter, 12 as a main. Adjust by grade: the larger the grade, the fewer you serve.
Questions fréquentes
- Which grade for a platter?
- N°3, versatile and plump, is best suited to a tasting platter.
- Does grade change the taste?
- Grade is a weight, not a taste quality — iodine and terroir come from the farming.