diff --git a/finetune/prepare_buckets_latents.py b/finetune/prepare_buckets_latents.py
index af08c537..1bccb1d3 100644
--- a/finetune/prepare_buckets_latents.py
+++ b/finetune/prepare_buckets_latents.py
@@ -215,7 +215,7 @@ def setup_parser() -> argparse.ArgumentParser:
         help="max resolution in fine tuning (width,height) / fine tuning時の最大画像サイズ 「幅,高さ」（使用メモリ量に関係します）",
     )
     parser.add_argument("--min_bucket_reso", type=int, default=256, help="minimum resolution for buckets / bucketの最小解像度")
-    parser.add_argument("--max_bucket_reso", type=int, default=1024, help="maximum resolution for buckets / bucketの最小解像度")
+    parser.add_argument("--max_bucket_reso", type=int, default=1024, help="maximum resolution for buckets / bucketの最大解像度")
     parser.add_argument(
         "--bucket_reso_steps",
         type=int,
diff --git a/library/train_util.py b/library/train_util.py
index cae0df84..0109b42a 100644
--- a/library/train_util.py
+++ b/library/train_util.py
@@ -149,6 +149,13 @@ class ImageInfo:
 
 class BucketManager:
     def __init__(self, no_upscale, max_reso, min_size, max_size, reso_steps) -> None:
+        if max_size is not None:
+            if max_reso is not None:
+                assert max_size >= max_reso[0], "the max_size should be larger than the width of max_reso"
+                assert max_size >= max_reso[1], "the max_size should be larger than the height of max_reso"
+            if min_size is not None:
+                assert max_size >= min_size, "the max_size should be larger than the min_size"
+
         self.no_upscale = no_upscale
         if max_reso is None:
             self.max_reso = None