diff --git a/dacapo/experiments/datasplits/datasets/arrays/zarr_array.py b/dacapo/experiments/datasplits/datasets/arrays/zarr_array.py
index 30c6ac693..7a1de471b 100644
--- a/dacapo/experiments/datasplits/datasets/arrays/zarr_array.py
+++ b/dacapo/experiments/datasplits/datasets/arrays/zarr_array.py
@@ -273,7 +273,9 @@ def roi(self) -> Roi:
             This method is used to return the region of interest of the array.
         """
         if self.snap_to_grid is not None:
-            return self._daisy_array.roi.snap_to_grid(self.snap_to_grid, mode="shrink")
+            return self._daisy_array.roi.snap_to_grid(
+             np.lcm(self.voxel_size, self.snap_to_grid), mode="shrink"
+         )
         else:
             return self._daisy_array.roi