Is there a typical ratio for Herbes de Provence?
Wiki's cited entry on Herbes de Provence is interesting. The ready-made spice blend "Herbes de Provence" did not come into existence until the 1970's, as a product marketed by the French company Ducros. If there's a standard blend ratio, it would therefore be what's in the Ducros' product - though since it is a generic term rather than a trademarked one, other manufacturers and cooks have their own recipes and interpretations.

Ducros' own blend breaks down like this, according to the "My French Cuisine" blog (who also has the McCormick blend breakdown and a home-made alternative blend sourced from a French cookbook):


Rosemary (romarin) – 26%
Savory (sariette) – 26%
Oregano (origan) – 26%
Thyme (thym) – 19%
Basil (basilic) – 3%