diff --git a/sam2/build_sam.py b/sam2/build_sam.py
index e55f85e..eb07ca1 100644
--- a/sam2/build_sam.py
+++ b/sam2/build_sam.py
@@ -79,8 +79,16 @@ def build_sam2_video_predictor(
 
 
 def build_sam2_hf(model_id, **kwargs):
-    config_file = hf_hub_download(repo_id=model_id, filename=f"{model_id}.yaml")
-    ckpt_path = hf_hub_download(repo_id=model_id, filename=f"{model_id}.pt")
+
+    model_id_to_filenames = {
+        "facebook/sam2-hiera-tiny": ("sam2_hiera_t.yaml", "sam2_hiera_tiny.pt"),
+        "facebook/sam2-hiera-small": ("sam2_hiera_s.yaml", "sam2_hiera_small.pt"),
+        "facebook/sam2-hiera-base-plus": ("sam2_hiera_b+.yaml", "sam2_hiera_base_plus.pt"),
+        "facebook/sam2-hiera-large": ("sam2_hiera_l.yaml", "sam2_hiera_large.pt"),
+    }
+    config_name, checkpoint_name = model_id_to_filenames[model_id]
+    config_file = hf_hub_download(repo_id=model_id, filename=config_name)
+    ckpt_path = hf_hub_download(repo_id=model_id, filename=checkpoint_name)
     return build_sam2_video_predictor(config_file=config_file, ckpt_path=ckpt_path, **kwargs)