diff --git a/netbox/dcim/forms/bulk_import.py b/netbox/dcim/forms/bulk_import.py
index 244407702..76fae478b 100644
--- a/netbox/dcim/forms/bulk_import.py
+++ b/netbox/dcim/forms/bulk_import.py
@@ -272,8 +272,13 @@ class RackImportForm(NetBoxModelImportForm):
     width = forms.ChoiceField(
         label=_('Width'),
         choices=RackWidthChoices,
+        required=False,
         help_text=_('Rail-to-rail width (in inches)')
     )
+    u_height = forms.IntegerField(
+        required=False,
+        label=_('Height (U)')
+    )
     outer_unit = CSVChoiceField(
         label=_('Outer unit'),
         choices=RackDimensionUnitChoices,
@@ -297,8 +302,8 @@ class RackImportForm(NetBoxModelImportForm):
         model = Rack
         fields = (
             'site', 'location', 'name', 'facility_id', 'tenant', 'status', 'role', 'rack_type', 'form_factor', 'serial',
-            'asset_tag', 'width', 'u_height', 'desc_units', 'outer_width', 'outer_depth', 'outer_unit', 'mounting_depth',
-            'airflow', 'weight', 'max_weight', 'weight_unit', 'description', 'comments', 'tags',
+            'asset_tag', 'width', 'u_height', 'desc_units', 'outer_width', 'outer_depth', 'outer_unit',
+            'mounting_depth', 'airflow', 'weight', 'max_weight', 'weight_unit', 'description', 'comments', 'tags',
         )
 
     def __init__(self, data=None, *args, **kwargs):
@@ -310,6 +315,16 @@ class RackImportForm(NetBoxModelImportForm):
             params = {f"site__{self.fields['site'].to_field_name}": data.get('site')}
             self.fields['location'].queryset = self.fields['location'].queryset.filter(**params)
 
+    def clean(self):
+        super().clean()
+
+        # width & u_height must be set if not specifying a rack type on import
+        if not self.instance.pk:
+            if not self.cleaned_data.get('rack_type') and not self.cleaned_data.get('width'):
+                raise forms.ValidationError(_("Width must be set if not specifying a rack type."))
+            if not self.cleaned_data.get('rack_type') and not self.cleaned_data.get('u_height'):
+                raise forms.ValidationError(_("U height must be set if not specifying a rack type."))
+
 
 class RackReservationImportForm(NetBoxModelImportForm):
     site = CSVModelChoiceField(