diff --git a/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java b/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
index 82481b0..1cbd5c7 100644
--- a/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
+++ b/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
@@ -128,7 +128,7 @@ else if (model.isStyle(NumberWidget.SLIDER_STYLE)) {
 		}
 		spinner.setEditor(new JSpinner.NumberEditor(spinner, format));
 
-		Dimension spinnerSize = spinner.getSize();
+		Dimension spinnerSize = spinner.getPreferredSize();
 		spinnerSize.width = 50;
 		spinner.setPreferredSize(spinnerSize);
 		fixSpinner(type);