diff --git a/src/Plugin/Field/FieldWidget/DimensionsDefaultWidget.php b/src/Plugin/Field/FieldWidget/DimensionsDefaultWidget.php
index 18c0866..8021b6f 100644
--- a/src/Plugin/Field/FieldWidget/DimensionsDefaultWidget.php
+++ b/src/Plugin/Field/FieldWidget/DimensionsDefaultWidget.php
@@ -36,6 +36,9 @@ class DimensionsDefaultWidget extends PhysicalWidgetBase {
       '#allow_unit_change' => $this->getSetting('allow_unit_change'),
       '#default_value' => $items[$delta]->getValue(),
     ] + $element;
+    if (array_filter($this->getSetting('allowed_units'))) {
+      $element['#available_units'] = $this->getSetting('allowed_units');
+    }
     if (!$this->getSetting('allow_unit_change')) {
       $element['#available_units'] = [$default_unit];
     }
diff --git a/src/Plugin/Field/FieldWidget/MeasurementDefaultWidget.php b/src/Plugin/Field/FieldWidget/MeasurementDefaultWidget.php
index 6aae62e..e47d522 100644
--- a/src/Plugin/Field/FieldWidget/MeasurementDefaultWidget.php
+++ b/src/Plugin/Field/FieldWidget/MeasurementDefaultWidget.php
@@ -35,6 +35,9 @@ class MeasurementDefaultWidget extends PhysicalWidgetBase {
       '#allow_unit_change' => $this->getSetting('allow_unit_change'),
       '#default_value' => $items[$delta]->getValue(),
     ] + $element;
+    if (array_filter($this->getSetting('allowed_units'))) {
+      $element['#available_units'] = $this->getSetting('allowed_units');
+    }
     if (!$this->getSetting('allow_unit_change')) {
       $element['#available_units'] = [$default_unit];
     }
diff --git a/src/Plugin/Field/FieldWidget/PhysicalWidgetBase.php b/src/Plugin/Field/FieldWidget/PhysicalWidgetBase.php
index 38ffc46..ccf9aea 100644
--- a/src/Plugin/Field/FieldWidget/PhysicalWidgetBase.php
+++ b/src/Plugin/Field/FieldWidget/PhysicalWidgetBase.php
@@ -17,6 +17,7 @@ abstract class PhysicalWidgetBase extends WidgetBase {
     return [
       'default_unit' => '',
       'allow_unit_change' => TRUE,
+      'allowed_units' => [],
     ] + parent::defaultSettings();
   }
 
@@ -36,6 +37,18 @@ abstract class PhysicalWidgetBase extends WidgetBase {
       '#default_value' => $this->getSetting('allow_unit_change'),
     ];
 
+    /** @var \Drupal\physical\UnitInterface $unit_class */
+    $unit_class = $this->getUnitClass();
+    $unit_class::getLabels();
+
+    $element['allowed_units'] = [
+      '#title' => $this->t('Allowed units'),
+      '#description' => $this->t('Select the units to display, selecting none will display all.'),
+      '#type' => 'checkboxes',
+      '#options' => $unit_class::getLabels(),
+      '#default_value' => $this->getSetting('allowed_units') ?: [],
+    ];
+
     return $element;
   }
 
@@ -87,8 +100,8 @@ abstract class PhysicalWidgetBase extends WidgetBase {
   /**
    * Gets the unit class for the current field.
    *
-   * @return string
-   *   The fully qualified class name.
+   * @return \Drupal\physical\UnitInterface
+   *   The unit class.
    */
   abstract protected function getUnitClass();