The three 4 inch long measuring spoons, link by a split ring, measure a dash, a pinch, and a smidgen, respectively, and are a great help when exact measurements are not supplied but a consistent result is desired....
1 pinch approx 7 grams
1 teaspoon approx 15 grams
1 tablespoon approx 30 grams
1 cup is 250 grams
1 kg is 1000 grams
sometimes and i means sometimes (specific or relative gravity laws applying) liquid and mass weights definitely differ. However, as a token weight measure being used, unless the specific or relative weight differs to a point where weighing is the only option, you should be able to convert metric to imperial.
i.e. 1 pound is approximately 500 to 550 grams metric.