diff --git a/hippunfold/config/snakebids.yml b/hippunfold/config/snakebids.yml
index a9286f86..29c12c79 100644
--- a/hippunfold/config/snakebids.yml
+++ b/hippunfold/config/snakebids.yml
@@ -190,9 +190,15 @@ parse_args:
     default: false
     action: store_true
 
+  --crop_native_res:
+    help: 'Sets the bounding box resolution for the crop native (e.g. cropT1w space). Under the hood, hippUnfold operates at higher resolution than the native image, so this tries to preserve some of that detail. (default: %(default)s)'
+    default: '0.2x0.2x0.2mm'
+
   --crop_native_box:
-    help: 'Sets the bounding box size for the crop native (e.g. cropT1w) space). Make this larger if your hippocampi in crop{T1w,T2w} space are getting cut-off (default: %(default)s)'
-    default: '256x256x256vox'
+    help: 'Sets the bounding box size for the crop native (e.g. cropT1w space). Make this larger if your hippocampi in crop{T1w,T2w} space are getting cut-off (default: %(default)s)'
+    default: '52x52x52mm'
+
+
 
   --atlas:
     choices:
@@ -386,7 +392,8 @@ nnunet_model:
   hippb500: trained_model.3d_fullres.Task110_hcp1200_b1000crop.nnUNetTrainerV2.model_best.tar
   neonateT1w: trained_model.3d_fullres.Task205_hcp1200_b1000_finetuneround2_dhcp_T1w.nnUNetTrainerV2.model_best.tar
 
-crop_native_box: '256x256x256vox'
+crop_native_box: '52x52x52mm'
+crop_native_res: '0.2x0.2x0.2mm'
 
 hippdwi_opts:
   resample_dim: '734x720x67' # from 220x216x20 @ 1x1x1mm -> 0.3mm
diff --git a/hippunfold/workflow/rules/resample_final_to_crop_native.smk b/hippunfold/workflow/rules/resample_final_to_crop_native.smk
index b8c9fbb6..e583be93 100644
--- a/hippunfold/workflow/rules/resample_final_to_crop_native.smk
+++ b/hippunfold/workflow/rules/resample_final_to_crop_native.smk
@@ -17,7 +17,7 @@ rule create_native_crop_ref:
             allow_missing=True,
         ),
     params:
-        resample="400%",
+        resample=config["crop_native_res"],
         pad_to=config["crop_native_box"],
     output:
         ref=bids(