diff --git a/onnxruntime/python/tools/transformers/models/stable_diffusion/demo_txt2img_xl.py b/onnxruntime/python/tools/transformers/models/stable_diffusion/demo_txt2img_xl.py
index 16e776a08282c..0b529875a2fe7 100644
--- a/onnxruntime/python/tools/transformers/models/stable_diffusion/demo_txt2img_xl.py
+++ b/onnxruntime/python/tools/transformers/models/stable_diffusion/demo_txt2img_xl.py
@@ -29,17 +29,7 @@
 from pipeline_txt2img_xl import Txt2ImgXLPipeline
 
 
-def run_demo():
-    """Run Stable Diffusion XL Base + Refiner together (known as ensemble of expert denoisers) to generate an image."""
-
-    args = parse_arguments(is_xl=True, description="Options for Stable Diffusion XL Demo")
-
-    prompt, negative_prompt = repeat_prompt(args)
-
-    # Recommend image size as one of those used in training (see Appendix I in https://arxiv.org/pdf/2307.01952.pdf).
-    image_height = args.height
-    image_width = args.width
-
+def load_pipelines(args, batch_size):
     # Register TensorRT plugins
     engine_type = get_engine_type(args.engine)
     if engine_type == EngineType.TRT:
@@ -49,19 +39,18 @@ def run_demo():
 
     max_batch_size = 16
     if (engine_type in [EngineType.ORT_TRT, EngineType.TRT]) and (
-        args.build_dynamic_shape or image_height > 512 or image_width > 512
+        args.build_dynamic_shape or args.height > 512 or args.width > 512
     ):
         max_batch_size = 4
 
-    batch_size = len(prompt)
     if batch_size > max_batch_size:
         raise ValueError(f"Batch size {batch_size} is larger than allowed {max_batch_size}.")
 
     # No VAE decoder in base when it outputs latent instead of image.
-    base_info = PipelineInfo(args.version, use_vae=False)
+    base_info = PipelineInfo(args.version, use_vae=False, min_image_size=640, max_image_size=1536)
     base = init_pipeline(Txt2ImgXLPipeline, base_info, engine_type, args, max_batch_size, batch_size)
 
-    refiner_info = PipelineInfo(args.version, is_refiner=True)
+    refiner_info = PipelineInfo(args.version, is_refiner=True, min_image_size=640, max_image_size=1536)
     refiner = init_pipeline(Img2ImgXLPipeline, refiner_info, engine_type, args, max_batch_size, batch_size)
 
     if engine_type == EngineType.TRT:
@@ -77,7 +66,13 @@ def run_demo():
             enable_vae_slicing = True
         if enable_vae_slicing:
             refiner.backend.enable_vae_slicing()
+    return base, refiner
 
+
+def run_pipelines(args, base, refiner, prompt, negative_prompt, is_warm_up=False):
+    image_height = args.height
+    image_width = args.width
+    batch_size = len(prompt)
     base.load_resources(image_height, image_width, batch_size)
     refiner.load_resources(image_height, image_width, batch_size)
 
@@ -112,10 +107,14 @@ def run_base_and_refiner(warmup=False):
         # inference once to get cuda graph
         _, _ = run_base_and_refiner(warmup=True)
 
-    print("[I] Warming up ..")
+    if args.num_warmup_runs > 0:
+        print("[I] Warming up ..")
     for _ in range(args.num_warmup_runs):
         _, _ = run_base_and_refiner(warmup=True)
 
+    if is_warm_up:
+        return
+
     print("[I] Running StableDiffusion XL pipeline")
     if args.nvtx_profile:
         cudart.cudaProfilerStart()
@@ -123,14 +122,80 @@ def run_base_and_refiner(warmup=False):
     if args.nvtx_profile:
         cudart.cudaProfilerStop()
 
-    base.teardown()
-
     print("|------------|--------------|")
     print("| {:^10} | {:>9.2f} ms |".format("e2e", latency))
     print("|------------|--------------|")
+
+
+def run_demo(args):
+    """Run Stable Diffusion XL Base + Refiner together (known as ensemble of expert denoisers) to generate an image."""
+
+    prompt, negative_prompt = repeat_prompt(args)
+    batch_size = len(prompt)
+    base, refiner = load_pipelines(args, batch_size)
+    run_pipelines(args, base, refiner, prompt, negative_prompt)
+    base.teardown()
+    refiner.teardown()
+
+
+def run_dynamic_shape_demo(args):
+    """Run demo of generating images with different size with list of prompts with ORT CUDA provider."""
+    args.engine = "ORT_CUDA"
+    args.scheduler = "UniPC"
+    args.denoising_steps = 8
+    args.disable_cuda_graph = True
+
+    batch_size = args.repeat_prompt
+    base, refiner = load_pipelines(args, batch_size)
+
+    image_sizes = [
+        (1024, 1024),
+        (1152, 896),
+        (896, 1152),
+        (1216, 832),
+        (832, 1216),
+        (1344, 768),
+        (768, 1344),
+        (1536, 640),
+        (640, 1536),
+    ]
+
+    # Warm up the pipelines. This only need once before serving.
+    args.prompt = ["warm up"]
+    args.num_warmup_runs = 3
+    prompt, negative_prompt = repeat_prompt(args)
+    for height, width in image_sizes:
+        args.height = height
+        args.width = width
+        print(f"\nWarm up pipelines for Batch_size={batch_size}, Height={height}, Width={width}")
+        run_pipelines(args, base, refiner, prompt, negative_prompt, is_warm_up=True)
+
+    # Run pipeline on a list of prompts.
+    prompts = [
+        "starry night over Golden Gate Bridge by van gogh",
+        "little cute gremlin sitting on a bed, cinematic",
+    ]
+    args.num_warmup_runs = 0
+    for example_prompt in prompts:
+        args.prompt = [example_prompt]
+        prompt, negative_prompt = repeat_prompt(args)
+
+        for height, width in image_sizes:
+            args.height = height
+            args.width = width
+            print(f"\nBatch_size={batch_size}, Height={height}, Width={width}, Prompt={example_prompt}")
+            run_pipelines(args, base, refiner, prompt, negative_prompt, is_warm_up=False)
+
+    base.teardown()
     refiner.teardown()
 
 
 if __name__ == "__main__":
     coloredlogs.install(fmt="%(funcName)20s: %(message)s")
-    run_demo()
+
+    args = parse_arguments(is_xl=True, description="Options for Stable Diffusion XL Demo")
+    no_prompt = isinstance(args.prompt, list) and len(args.prompt) == 1 and not args.prompt[0]
+    if no_prompt:
+        run_dynamic_shape_demo(args)
+    else:
+        run_demo(args)
diff --git a/onnxruntime/python/tools/transformers/models/stable_diffusion/demo_utils.py b/onnxruntime/python/tools/transformers/models/stable_diffusion/demo_utils.py
index e65efd2c53839..d0e4e3adefbc3 100644
--- a/onnxruntime/python/tools/transformers/models/stable_diffusion/demo_utils.py
+++ b/onnxruntime/python/tools/transformers/models/stable_diffusion/demo_utils.py
@@ -78,7 +78,7 @@ def parse_arguments(is_xl: bool, description: str):
         help="Root Directory to store torch or ONNX models, built engines and output images etc.",
     )
 
-    parser.add_argument("prompt", nargs="+", help="Text prompt(s) to guide image generation.")
+    parser.add_argument("prompt", nargs="*", default=[""], help="Text prompt(s) to guide image generation.")
 
     parser.add_argument(
         "--negative-prompt", nargs="*", default=[""], help="Optional negative prompt(s) to guide the image generation."
diff --git a/onnxruntime/python/tools/transformers/models/stable_diffusion/diffusion_models.py b/onnxruntime/python/tools/transformers/models/stable_diffusion/diffusion_models.py
index 4a2e9eb3443da..d93ca8dba7fa0 100644
--- a/onnxruntime/python/tools/transformers/models/stable_diffusion/diffusion_models.py
+++ b/onnxruntime/python/tools/transformers/models/stable_diffusion/diffusion_models.py
@@ -82,12 +82,21 @@ def infer_shapes(self):
 
 
 class PipelineInfo:
-    def __init__(self, version: str, is_inpaint: bool = False, is_refiner: bool = False, use_vae=False):
+    def __init__(
+        self,
+        version: str,
+        is_inpaint: bool = False,
+        is_refiner: bool = False,
+        use_vae=False,
+        min_image_size=256,
+        max_image_size=1024,
+    ):
         self.version = version
         self._is_inpaint = is_inpaint
         self._is_refiner = is_refiner
         self._use_vae = use_vae
-
+        self._min_image_size = min_image_size
+        self._max_image_size = max_image_size
         if is_refiner:
             assert self.is_xl()
 
@@ -187,6 +196,12 @@ def unet_embedding_dim(self):
         else:
             raise ValueError(f"Invalid version {self.version}")
 
+    def min_image_size(self):
+        return self._min_image_size
+
+    def max_image_size(self):
+        return self._max_image_size
+
 
 class BaseModel:
     def __init__(
@@ -209,8 +224,8 @@ def __init__(
 
         self.min_batch = 1
         self.max_batch = max_batch_size
-        self.min_image_shape = 256  # min image resolution: 256x256
-        self.max_image_shape = 1024  # max image resolution: 1024x1024
+        self.min_image_shape = pipeline_info.min_image_size()
+        self.max_image_shape = pipeline_info.max_image_size()
         self.min_latent_shape = self.min_image_shape // 8
         self.max_latent_shape = self.max_image_shape // 8
 
diff --git a/onnxruntime/python/tools/transformers/models/stable_diffusion/pipeline_stable_diffusion.py b/onnxruntime/python/tools/transformers/models/stable_diffusion/pipeline_stable_diffusion.py
index e28db2b77105a..e34fab1218b21 100644
--- a/onnxruntime/python/tools/transformers/models/stable_diffusion/pipeline_stable_diffusion.py
+++ b/onnxruntime/python/tools/transformers/models/stable_diffusion/pipeline_stable_diffusion.py
@@ -163,12 +163,9 @@ def is_backend_tensorrt(self):
         return self.engine_type == EngineType.TRT
 
     def set_denoising_steps(self, denoising_steps: int):
-        if self.denoising_steps != denoising_steps:
-            assert self.denoising_steps is None  # TODO(tianleiwu): support changing steps in different runs
-            # Pre-compute latent input scales and linear multistep coefficients
-            self.scheduler.set_timesteps(denoising_steps)
-            self.scheduler.configure()
-            self.denoising_steps = denoising_steps
+        self.scheduler.set_timesteps(denoising_steps)
+        self.scheduler.configure()
+        self.denoising_steps = denoising_steps
 
     def load_resources(self, image_height, image_width, batch_size):
         # If engine is built with static input shape, call this only once after engine build.