diff --git a/src/conformist/alpha_selector.py b/src/conformist/alpha_selector.py
index 2b49a1a..45a5779 100644
--- a/src/conformist/alpha_selector.py
+++ b/src/conformist/alpha_selector.py
@@ -8,6 +8,11 @@
 
 
 class AlphaSelector(OutputDir):
+    FIGURE_FONTSIZE = 12
+    FIGURE_WIDTH = 12
+    FIGURE_HEIGHT = 8
+    plt.rcParams.update({'font.size': FIGURE_FONTSIZE})
+
     def __init__(self,
                  prediction_dataset: PredictionDataset,
                  cop_class,
@@ -32,6 +37,7 @@ def __init__(self,
         self.pcts_empty_sets = []
         self.pcts_singleton_sets = []
         self.pcts_singleton_or_duo_sets = []
+        self.pcts_duo_plus_sets = []
         self.pcts_trio_plus_sets = []
         self.mean_false_negative_rates = []
         self.mean_softmax_threshold = []
@@ -54,6 +60,7 @@ def run(self):
             self.pcts_singleton_sets.append(trial.pct_singleton_sets())
             self.pcts_singleton_or_duo_sets.append(
                 trial.pct_singleton_or_duo_sets())
+            self.pcts_duo_plus_sets.append(trial.pct_duo_plus_sets())
             self.pcts_trio_plus_sets.append(trial.pct_trio_plus_sets())
             self.mean_false_negative_rates.append(
                 trial.mean_false_negative_rate())
@@ -69,7 +76,9 @@ def run_reports(self):
 
     def visualize(self):
         # MEAN SET SIZES GRAPH
-        plt.figure()
+        plt.figure(figsize=(self.FIGURE_WIDTH,
+                            self.FIGURE_HEIGHT))
+        plt.tight_layout()
 
         data = pd.DataFrame({
             'Alpha': self.alphas,
@@ -80,7 +89,10 @@ def visualize(self):
         plt.savefig(f'{self.output_dir}/alpha_to_mean_set_size.png')
 
         # PERCENT EMPTY/SINGLETON SETS GRAPH
-        plt.figure()
+        # MEAN SET SIZES GRAPH
+        plt.figure(figsize=(self.FIGURE_WIDTH,
+                            self.FIGURE_HEIGHT))
+        plt.tight_layout()
 
         # Labels
         x_label = 'Alpha'
@@ -90,9 +102,9 @@ def visualize(self):
         # Create a DataFrame for the pct_empty_sets and pct_singleton_sets
         data = pd.DataFrame({
             x_label: self.alphas,
-            'n = 0': self.pcts_empty_sets,
-            'n ∈ {1, 2}': self.pcts_singleton_or_duo_sets,
-            'n ≥ 3': self.pcts_trio_plus_sets
+            'empty (n = 0)': self.pcts_empty_sets,
+            'certain (n=1)': self.pcts_singleton_or_duo_sets,
+            'uncertain (n ≥ 2)': self.pcts_duo_plus_sets
         })
 
         # Melt the DataFrame to have the set types as a separate column
@@ -110,14 +122,16 @@ def visualize(self):
         # Get the current x-tick labels
         labels = [item.get_text() for item in plt.gca().get_xticklabels()]
 
+        target = 'certain (n=1)'
+
         # Draw a horizontal line across the top of the highest orange bar
-        max_singleton_or_duo_sets = data['n ∈ {1, 2}'].max()
-        plt.axhline(y=max_singleton_or_duo_sets,
+        optimal_value = data[target].max()
+        plt.axhline(y=optimal_value,
                     color='#cccccc',
                     linestyle='--')
 
         # Get the index of the label with the highest value
-        idx = data['n ∈ {1, 2}'].idxmax()
+        idx = data[target].idxmax()
 
         # Make this label bold
         labels[idx] = f'$\\bf{{{labels[idx]}}}$'
@@ -131,7 +145,9 @@ def visualize(self):
         plt.savefig(f'{self.output_dir}/alpha_to_set_sizes.png')
 
     def visualize_lambdas(self):
-        plt.figure()
+        plt.figure(figsize=(self.FIGURE_WIDTH,
+                            self.FIGURE_HEIGHT))
+        plt.tight_layout()
 
         # Only use reasonable alphas
         alphas = [0.05, 0.1, 0.15, 0.2, 0.3, 0.4]
@@ -156,7 +172,7 @@ def visualize_lambdas(self):
             plt.text(self.lamhats[a], 0 + padding,
                      f'{self.lamhats[a]:.2f}',
                      ha='center', va='bottom',
-                     fontsize=8, color='black',
+                     color='black',
                      weight='bold')
             i += 1
 
@@ -179,9 +195,8 @@ def save_summary(self):
             'alpha': self.alphas,
             'Mean set size': self.mean_set_sizes,
             '% sets n=0': self.pcts_empty_sets,
-            '% sets n={1}': self.pcts_singleton_sets,
-            '% sets n={1|2}': self.pcts_singleton_or_duo_sets,
-            '% sets n>=3': self.pcts_trio_plus_sets,
+            '% sets n=1': self.pcts_singleton_sets,
+            '% sets n>=2': self.pcts_duo_plus_sets,
             'Mean FNR': self.mean_false_negative_rates,
             'Mean softmax threshold': self.mean_softmax_threshold
         }
diff --git a/src/conformist/performance_report.py b/src/conformist/performance_report.py
index e751211..18ebc87 100644
--- a/src/conformist/performance_report.py
+++ b/src/conformist/performance_report.py
@@ -28,11 +28,17 @@ def pct_singleton_or_duo_sets(prediction_sets):
                    prediction_set in prediction_sets) / \
                     len(prediction_sets)
 
-    def pct_trio_plus_sets(prediction_sets):
-        return sum(sum(prediction_set) >= 3 for
+    def _pct_sets_of_min_size(prediction_sets, min_size):
+        return sum(sum(prediction_set) >= min_size for
                    prediction_set in prediction_sets) / \
                     len(prediction_sets)
 
+    def pct_duo_plus_sets(prediction_sets):
+        return PerformanceReport._pct_sets_of_min_size(prediction_sets, 2)
+
+    def pct_trio_plus_sets(prediction_sets):
+        return PerformanceReport._pct_sets_of_min_size(prediction_sets, 3)
+
     def _class_report(self,
                       items_by_class,
                       output_file_prefix,
diff --git a/src/conformist/prediction_dataset.py b/src/conformist/prediction_dataset.py
index 791c1e8..dedc8ac 100644
--- a/src/conformist/prediction_dataset.py
+++ b/src/conformist/prediction_dataset.py
@@ -21,7 +21,6 @@ class PredictionDataset(OutputDir):
     FIGURE_WIDTH = 12
     plt.rcParams.update({'font.size': FIGURE_FONTSIZE})
 
-
     def __init__(self,
                  df=None,
                  predictions_csv=None,
diff --git a/src/conformist/validation_run.py b/src/conformist/validation_run.py
index 8bb2d38..60e9664 100644
--- a/src/conformist/validation_run.py
+++ b/src/conformist/validation_run.py
@@ -53,6 +53,9 @@ def pct_singleton_sets(self):
     def pct_singleton_or_duo_sets(self):
         return PerformanceReport.pct_singleton_or_duo_sets(self.prediction_sets)
 
+    def pct_duo_plus_sets(self):
+        return PerformanceReport.pct_duo_plus_sets(self.prediction_sets)
+
     def pct_trio_plus_sets(self):
         return PerformanceReport.pct_trio_plus_sets(self.prediction_sets)
 
@@ -130,6 +133,7 @@ def run_reports(self, base_output_dir):
             'pct_empty_sets': self.pct_empty_sets(),
             'pct_singleton_sets': self.pct_singleton_sets(),
             'pct_singleton_or_duo_sets': self.pct_singleton_or_duo_sets(),
+            'pct_duo_plus_sets': self.pct_duo_plus_sets(),
             'pct_trio_plus_sets': self.pct_trio_plus_sets()
         }, index=[0])
 
diff --git a/src/conformist/validation_trial.py b/src/conformist/validation_trial.py
index 11f6538..0e4531e 100644
--- a/src/conformist/validation_trial.py
+++ b/src/conformist/validation_trial.py
@@ -36,6 +36,12 @@ def pct_singleton_or_duo_sets(self):
             singleton_or_duo.append(run.pct_singleton_or_duo_sets())
         return statistics.mean(singleton_or_duo)
 
+    def pct_duo_plus_sets(self):
+        duo_plus = []
+        for run in self.runs:
+            duo_plus.append(run.pct_duo_plus_sets())
+        return statistics.mean(duo_plus)
+
     def pct_trio_plus_sets(self):
         trio_plus = []
         for run in self.runs: