One small sprig of rosemary converts to 1/2 a teaspoon of dried rosemary.
About 2 to 3 tablespoons.
When using dry herbs versus fresh herbs, a good rule of thumb is to use 1 portion of dry herbs for every 3 portions of fresh herbs. So, one tsp of dried tarragon would be the equivalent to 3 tsps. of fresh tarragon.
With thyme one fresh sprig equals one-half teaspoon of dried thyme. In general, use two to three times the amount of fresh thyme as dried. When adding to soups and stews, crush the leaves between your hands before stirring it in your recipe.
As much as you want, - a "large" sprig could be any size, you are seeing it, not us.
You'll have to explain to us how you define the volume of a "sprig"
1 4" sprig yields approximately 1 Tablespoon of fresh oregano. 1 Tablespoon of fresh oregano is equivalent to 1 teaspoon of dried. Therefore, 1 sprig is approximately equal to 1 teaspoon dried, so 2 sprigs = approximately 2 teaspoons of dried oregano. :)
the main stem
About 3 gm.
a single sprig of rosemary was another symbol of remembrance day.
Dried thyme has a very strong flavor. Measure in 1/4 to 1/2 teaspoons depending on the volume of the ingredients.
Approximately 3/4 of a teaspoon should equal one dill head.