diff --git a/config/settings/base.py b/config/settings/base.py
index ef62148..db15b5d 100644
--- a/config/settings/base.py
+++ b/config/settings/base.py
@@ -271,7 +271,7 @@
         'label': '**Mask a country** using `cdo` and the ISIMIP countrymask,'
                  ' keeping the grid and setting everything outside to `missing_value`.',
         'template': 'download/operations/mask_country.html',
-        'resolutions': ['30arcmin'],
+        'resolutions': ['15arcmin', '30arcmin', '60arcmin', '120arcmin'],
         'initial': {
             'country': 'aus',
             'compute_mean': False,
diff --git a/isimip_data/download/templates/download/operations/mask_country.html b/isimip_data/download/templates/download/operations/mask_country.html
index 7f99046..70e82a9 100644
--- a/isimip_data/download/templates/download/operations/mask_country.html
+++ b/isimip_data/download/templates/download/operations/mask_country.html
@@ -7,3 +7,10 @@
 <p>
     Everything outside is set to <code>missing_value</code> and the grid is kept.
 </p>
+
+<p>
+    Note that our binary country mask is constructed in such a way that any grid cell touched
+    by the country is fully counted for that country. One effect of this is that grid cells may
+    belong to more than one country. Also, the calculation of the field mean for the country
+    will be different than when using a fractional mask.
+</p>