Two hundred fifty grams is about 2.08 cups of all-purpose flour, 1.26 cups of granulated sugar and 1.10 cups of butter. The same weight fills a different volume for every ingredient, so the ingredient name remains essential.
For flour, the small amount above two cups is difficult to estimate consistently with volume measures. Keep the original 250 gram weight whenever the recipe depends on an exact flour-to-liquid ratio.
This amount appears often in bread, cakes, pastry and medium-size cookie batches. It is also a useful reference when scaling a recipe from kilograms to smaller household quantities.