diff --git a/README.md b/README.md
index 75bf82e..904663f 100644
--- a/README.md
+++ b/README.md
@@ -93,7 +93,7 @@ await rtClient.setImage(garmentBlob, {
 });
 ```
 
-Call `setImage()` again at any time to switch garments - no need to reconnect.
+Call `setImage()` again at any time to switch garments - no need to reconnect. For fast switching, resize garment images to a max of 1024px before sending; large images (>1024px) significantly increase switch latency.
 
 ---
 
@@ -107,7 +107,7 @@ The ideal setup is a **clean garment image** paired with a **descriptive prompt*
 
 - **Clean garment images work best** - just the clothing item, no person wearing it
 - **White or clean backgrounds** are ideal
-- **At least 512x512 pixels** - the model reproduces what it sees, so clear garment = better results
+- **512–1024px on the long edge** - the model reproduces what it sees, so clear garment = better results. Images larger than 1024px add latency without improving quality; always resize before calling `setImage()`.
 - If your source image shows a person wearing the garment, consider using an image editing model to extract just the clothing item
 
 **Prompt structure:**
diff --git a/examples/mobile-fitting-room/app/page.tsx b/examples/mobile-fitting-room/app/page.tsx
index d0ea553..8975e46 100644
--- a/examples/mobile-fitting-room/app/page.tsx
+++ b/examples/mobile-fitting-room/app/page.tsx
@@ -6,7 +6,7 @@ import { useDecartRealtime } from "@/hooks/useDecartRealtime";
 import { useHandGesture } from "@/hooks/useHandGesture";
 import { useFittingQueue } from "@/hooks/useFittingQueue";
 import { useFittingRotation } from "@/hooks/useFittingRotation";
-import { urlToImageBlob } from "@/lib/image-utils";
+import { urlToImageBlob, resizeImageBlob } from "@/lib/image-utils";
 import { PRODUCTS } from "@/lib/products";
 import type { Product } from "@/lib/products";
 import { ShoppingView } from "@/components/ShoppingView";
@@ -33,7 +33,7 @@ export default function FittingRoomPage() {
       if (!clientRef.current) return;
       setProcessingStatus("Applying...");
       try {
-        const blob = await urlToImageBlob(product.image);
+        const blob = await urlToImageBlob(product.image).then(resizeImageBlob);
         await clientRef.current.setImage(blob, {
           prompt: product.prompt,
           enhance: false,
@@ -86,7 +86,7 @@ export default function FittingRoomPage() {
     const [cameraStream, token, firstBlob] = await Promise.all([
       stream ?? startCamera(),
       fetchToken(),
-      urlToImageBlob(queue[0].image).catch(() => undefined),
+      urlToImageBlob(queue[0].image).then(resizeImageBlob).catch(() => undefined),
     ]);
 
     if (cameraStream && token) {