diff --git a/src/Event/V3/ImageBodyEvent.php b/src/Event/V3/ImageBodyEvent.php
index c7fcca6..3bab5b5 100644
--- a/src/Event/V3/ImageBodyEvent.php
+++ b/src/Event/V3/ImageBodyEvent.php
@@ -22,6 +22,7 @@ class ImageBodyEvent extends Event {
    */
   public function __construct(
     protected FileInterface $image,
+    protected string $size = 'full',
   ) {
   }
 
@@ -58,4 +59,14 @@ public function getBodies() : array {
     return $this->bodies;
   }
 
+  /**
+   * Get the requested size hint.
+   *
+   * @return string
+   *   The size hint requested for the event.
+   */
+  public function getSize() : string {
+    return $this->size;
+  }
+
 }
diff --git a/src/EventSubscriber/V3/BaseImageBodyEventSubscriber.php b/src/EventSubscriber/V3/BaseImageBodyEventSubscriber.php
index 972b102..29ead87 100644
--- a/src/EventSubscriber/V3/BaseImageBodyEventSubscriber.php
+++ b/src/EventSubscriber/V3/BaseImageBodyEventSubscriber.php
@@ -57,13 +57,15 @@ public function baseBody(ImageBodyEvent $event) : void {
    *   The file for which to generate a bod.
    * @param array $extra
    *   An associative array of extra values to be set in the body.
+   * @param string $size
+   *   The requested size.
    *
    * @return array
    *   The body.
    *
    * @throws \Drupal\Component\Plugin\Exception\PluginException
    */
-  protected function getBody(?string $slug, FileInterface $file, array $extra = []) : array {
+  protected function getBody(?string $slug, FileInterface $file, array $extra = [], string $size = 'full') : array {
     if (!$slug) {
       return [];
     }
@@ -73,7 +75,7 @@ protected function getBody(?string $slug, FileInterface $file, array $extra = []
       '{identifier}' => rawurlencode($id_plugin->getIdentifier($file)),
     ]);
     return [
-      'id' => "$base_id/full/full/0/default.jpg",
+      'id' => "{$base_id}/full/{$size}/0/default.jpg",
       'type' => 'Image',
       'format' => 'image/jpeg',
       'service' => [
@@ -96,6 +98,9 @@ public function imageV1Body(ImageBodyEvent $event) : void {
         'type' => 'ImageService1',
         'profile' => 'level2',
       ],
+      // @todo Validate that the size spec is valid for IIIF-I V1, maybe map to
+      // something similar if unsupported?
+      $event->getSize(),
     ));
   }
 
@@ -110,6 +115,9 @@ public function imageV2Body(ImageBodyEvent $event) : void {
         'type' => 'ImageService2',
         'profile' => 'level2',
       ],
+      // @todo Validate that the size spec is valid for IIIF-I V2, maybe map to
+      // something similar if unsupported?
+      $event->getSize(),
     ));
   }
 
@@ -124,6 +132,9 @@ public function imageV3Body(ImageBodyEvent $event) : void {
         'type' => 'ImageService3',
         'profile' => 'level2',
       ],
+      // @todo Validate that the size spec is valid for IIIF-I V3, maybe map to
+      // something similar if unsupported?
+      $event->getSize(),
     ));
   }