These mini cookies are 2 inch..
My recipe for royal icing...
1 egg white
3 cups powdered sugar
3-5 drops (or more) of lemon juice
1 / 4 teaspoon cream of tartar
almond extract if desired
While rubbing in egg white, gradually add sugar (do not beat egg whites). At the end put cream of tartar, lemon juice and essence. Consistency should not be too thick, but not liquid.