diff --git a/+iosr/+statistics/boxPlot.m b/+iosr/+statistics/boxPlot.m
index 0754b37..2a9de94 100644
--- a/+iosr/+statistics/boxPlot.m
+++ b/+iosr/+statistics/boxPlot.m
@@ -1786,11 +1786,12 @@ function drawGlobalGraphics(obj)
                 set(obj.handles.means,'markersize',obj.meanSize);
             end
             
-            % sample size
-            if obj.sampleSize && isfield(obj.handles,'groupsTxt')
+            % set group label font size
+            if isfield(obj.handles,'groupsTxt')
                 set(obj.handles.groupsTxt,'FontSize',obj.groupLabelFontSize);
             end
             
+            % set additional percentile font size
             if ~isempty(obj.addPrctiles) && isfield(obj.handles,'addPrctilesTxt')
                 set(obj.handles.addPrctilesTxt,'FontSize',obj.addPrctilesTxtSize);
             end