diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index d5817def57..bd7ff6c177 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -1651,8 +1651,8 @@
                 },
                 "small_skin_width":
                 {
-                    "label": "Small Top/Bottom width",
-                    "description": "Small Top/Bottom regions are filled with walls instead of the normal Top/Bottom pattern. This helps to avoids jerky motions.",
+                    "label": "Small Top/Bottom Width",
+                    "description": "Small top/bottom regions are filled with walls instead of the default top/bottom pattern. This helps to avoids jerky motions.",
                     "value": "skin_line_width * 2",
                     "default_value": 1,
                     "minimum_value": "0",
@@ -1660,7 +1660,8 @@
                     "type": "float",
                     "enabled": "(top_layers > 0 or bottom_layers > 0) and top_bottom_pattern != 'concentric'",
                     "limit_to_extruder": "top_bottom_extruder_nr",
-                    "settable_per_mesh": true
+                    "settable_per_mesh": true,
+                    "unit": "mm"
                 },
                 "skin_no_small_gaps_heuristic":
                 {