diff --git a/features/asset-size/data.json b/features/asset-size/data.json
new file mode 100644
index 00000000..ab88577f
--- /dev/null
+++ b/features/asset-size/data.json
@@ -0,0 +1,14 @@
+{
+    "title": "Asset Size",
+    "description": "Allows you to hover over any asset (costumes and sounds) in the editor to view the file size.",
+    "credits": [
+      {
+        "url": "https://scratch.mit.edu/users/rgantzos/",
+        "username": "rgantzos"
+      }
+    ],
+    "type": ["Editor"],
+    "dynamic": true,
+    "scripts": [{ "file": "script.js", "runOn": "/projects/*" }]
+  }
+  
\ No newline at end of file
diff --git a/features/asset-size/script.js b/features/asset-size/script.js
new file mode 100644
index 00000000..382c7046
--- /dev/null
+++ b/features/asset-size/script.js
@@ -0,0 +1,59 @@
+export default async function ({ feature, console }) {
+  ScratchTools.waitForElements(
+    "div[class*='asset-panel_wrapper_'] div[class*='selector_list-area_'] > div",
+    function (asset) {
+      if (asset.dataset.ste === "ste-file-size") return;
+      asset.dataset.ste = "ste-file-size";
+
+      let content = asset.querySelector(
+        "div[class*='sprite-selector-item_sprite-info_-'] div[class*='sprite-selector-item_sprite-details_']"
+      );
+
+      asset.firstChild.addEventListener("mouseover", function () {
+        if (!feature.self.enabled) return;
+        
+        let scratchAsset = ScratchTools.Scratch.vm.editingTarget;
+        let targetAssets =
+          feature.traps.gui().editorTab?.activeTabIndex === 1
+            ? scratchAsset.getCostumes()
+            : scratchAsset.getSounds();
+        let data = targetAssets[getElementIndex(asset)].asset.data.byteLength;
+
+        content.dataset.previousContent = content.textContent;
+        content.textContent = formatBytes(data);
+      });
+
+      asset.firstChild.addEventListener("mouseout", function () {
+        if (content.dataset.previousContent) {
+          content.textContent = content.dataset.previousContent;
+        }
+      });
+    }
+  );
+
+  function getElementIndex(element) {
+    const parent = element.parentElement;
+
+    const children = parent.children;
+
+    for (let i = 0; i < children.length; i++) {
+      if (children[i] === element) {
+        return i;
+      }
+    }
+
+    return -1;
+  }
+
+  function formatBytes(bytes, decimals = 2) {
+    if (bytes === 0) return "0 Bytes";
+
+    const k = 1024;
+    const sizes = ["Bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+
+    const sizeInUnits = parseFloat((bytes / Math.pow(k, i)).toFixed(decimals));
+
+    return `${sizeInUnits} ${sizes[i]}`;
+  }
+}
diff --git a/features/features.json b/features/features.json
index 6ccffea7..9f0054a1 100644
--- a/features/features.json
+++ b/features/features.json
@@ -1,4 +1,9 @@
 [
+  {
+    "version": 2,
+    "id": "asset-size",
+    "versionAdded": "v4.0.0"
+  },
   {
     "version": 2,
     "id": "disable-cloud",
diff --git a/features/remaining-replies/script.js b/features/remaining-replies/script.js
index b9193f80..ac444348 100644
--- a/features/remaining-replies/script.js
+++ b/features/remaining-replies/script.js
@@ -1,6 +1,4 @@
 export default async function ({ feature, console }) {
-    window.feature = feature
-
   ScratchTools.waitForElements(".flex-row.comment", function (comment) {
     let data = feature.redux
       .getState()