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 e833419..8a881a2 100644
--- a/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
+++ b/src/main/java/org/scijava/ui/swing/widget/SwingNumberWidget.java
@@ -119,6 +119,11 @@ else if (model.isStyle(NumberWidget.SLIDER_STYLE)) {
 		final SpinnerNumberModel spinnerModel =
 			new SpinnerNumberModelFactory().createModel(value, min, max, stepSize);
 		spinner = new JSpinner(spinnerModel);
+		String format = getFormat(model);
+		if (format != null) {
+			spinner.setEditor(new JSpinner.NumberEditor(spinner, format));
+		}
+
 		Dimension spinnerSize = spinner.getSize();
 		spinnerSize.width = 50;
 		spinner.setPreferredSize(spinnerSize);
@@ -132,6 +137,17 @@ else if (model.isStyle(NumberWidget.SLIDER_STYLE)) {
 		syncSliders();
 	}
 
+	private String getFormat(WidgetModel model) {
+		final String widgetStyle = model.getItem().getWidgetStyle();
+		String format = null;
+		for (final String s : widgetStyle.split(",")) {
+			if (s.startsWith("format:")) {
+				format = s.substring(s.indexOf(":") + 1).trim();
+			}
+		}
+		return format;
+	}
+
 	// -- Typed methods --
 
 	@Override