diff --git a/src/conformist/base_cop.py b/src/conformist/base_cop.py
index 64734bf..e133ba2 100644
--- a/src/conformist/base_cop.py
+++ b/src/conformist/base_cop.py
@@ -15,6 +15,11 @@
 
 
 class BaseCoP(OutputDir):
+    FIGURE_FONTSIZE = 12
+    FIGURE_WIDTH = 12
+    FIGURE_HEIGHT = 8
+    plt.rcParams.update({'font.size': FIGURE_FONTSIZE})
+
     def __init__(self, prediction_dataset: PredictionDataset, alpha=0.1):
         self.prediction_dataset = prediction_dataset
         self.alpha = alpha
@@ -171,7 +176,10 @@ def predict(self,
             df = pd.DataFrame(stats, index=[0])
             df.T.to_csv(f'{self.output_dir}/summary.csv', header=False)
 
-        return formatted_predictions, vr
+        if validate:
+            return formatted_predictions, vr
+        else:
+            return formatted_predictions
 
     def prediction_set_to_text(self, prediction_set, display_classes=None):
         class_names = self.class_names
@@ -190,7 +198,8 @@ def prediction_sets_to_text(self, prediction_sets, display_classes=None):
                 for prediction_set in prediction_sets]
 
     def upset_plot(self, predictions_sets, output_dir, color="black"):
-        plt.figure()
+        plt.figure(figsize=(self.FIGURE_WIDTH,
+                            self.FIGURE_HEIGHT))
 
         class_names = self.class_names