The ornamental design for kitchen scale, as shown and described.
FIG. 1 is a perspective view of an embodiment of kitchen scale showing my new design.
FIG. 2 is a front elevational view of the kitchen scale of FIG. 1.
FIG. 3 is a rear elevational view of the kitchen scale of FIG. 1.
FIG. 4 is a right side elevational view of the kitchen scale of FIG. 1.
FIG. 5 is a left side elevational view of the kitchen scale of FIG. 1.
FIG. 6 is a top plan view of the kitchen scale of FIG. 1; and,
FIG. 7 is a bottom plan view of the kitchen scale of FIG. 1.
The broken lines appearing in the figures are for the purpose of illustrating the environmental structure of the article of the claimed design and form no part of the claimed design.