diff --git a/app/assets/javascripts/admin/products/services/variant_unit_manager.js.coffee b/app/assets/javascripts/admin/products/services/variant_unit_manager.js.coffee
index d48ca458cd..244d51cde6 100644
--- a/app/assets/javascripts/admin/products/services/variant_unit_manager.js.coffee
+++ b/app/assets/javascripts/admin/products/services/variant_unit_manager.js.coffee
@@ -14,7 +14,7 @@ angular.module("admin.products").factory "VariantUnitManager", ->
         453.6:
           name: 'lb'
           system: 'imperial'
-        28.34952:
+        28.35:
           name: 'oz'
           system: 'imperial'
       'volume':
diff --git a/app/models/product_import/unit_converter.rb b/app/models/product_import/unit_converter.rb
index f9467f4ac5..c5321a4990 100644
--- a/app/models/product_import/unit_converter.rb
+++ b/app/models/product_import/unit_converter.rb
@@ -32,7 +32,7 @@ module ProductImport
       {
         'g' => { scale: 1, unit: 'weight' },
         'kg' => { scale: 1000, unit: 'weight' },
-        'oz' => { scale: 28.34952, unit: 'weight' },
+        'oz' => { scale: 28.35, unit: 'weight' },
         'lb' => { scale: 453.6, unit: 'weight' },
         't' => { scale: 1_000_000, unit: 'weight' },
         'ml' => { scale: 0.001, unit: 'volume' },
diff --git a/lib/open_food_network/option_value_namer.rb b/lib/open_food_network/option_value_namer.rb
index e7b929a029..f47bddc20a 100644
--- a/lib/open_food_network/option_value_namer.rb
+++ b/lib/open_food_network/option_value_namer.rb
@@ -39,7 +39,6 @@ module OpenFoodNetwork
       if @variant.unit_value.present?
         if %w(weight volume).include? @variant.product.variant_unit
           value, unit_name = option_value_value_unit_scaled
-
         else
           value = @variant.unit_value
           unit_name = pluralize(@variant.product.variant_unit_name, value)
@@ -66,7 +65,7 @@ module OpenFoodNetwork
       units = {
         'weight' => {
           1.0 =>         { 'name' => 'g',  'system' => 'metric' },
-          28.34952 =>    { 'name' => 'oz', 'system' => 'imperial' },
+          28.35 =>       { 'name' => 'oz', 'system' => 'imperial' },
           453.6 =>       { 'name' => 'lb', 'system' => 'imperial' },
           1000.0 =>      { 'name' => 'kg', 'system' => 'metric' },
           1_000_000.0 => { 'name' => 'T',  'system' => 'metric' }
diff --git a/spec/javascripts/unit/admin/services/variant_unit_manager_spec.js.coffee b/spec/javascripts/unit/admin/services/variant_unit_manager_spec.js.coffee
index f9664ad55b..40f03cf8cb 100644
--- a/spec/javascripts/unit/admin/services/variant_unit_manager_spec.js.coffee
+++ b/spec/javascripts/unit/admin/services/variant_unit_manager_spec.js.coffee
@@ -29,7 +29,7 @@ describe "VariantUnitManager", ->
 
   describe "unitScales", ->
     it "returns a sorted set of scales for unit type weight", ->
-      expect(VariantUnitManager.unitScales('weight')).toEqual [1.0, 28.34952, 453.6, 1000.0, 1000000.0]
+      expect(VariantUnitManager.unitScales('weight')).toEqual [1.0, 28.35, 453.6, 1000.0, 1000000.0]
 
     it "returns a sorted set of scales for unit type volume", ->
       expect(VariantUnitManager.unitScales('volume')).toEqual [0.001, 1.0, 1000.0]
@@ -37,13 +37,13 @@ describe "VariantUnitManager", ->
   describe "compatibleUnitScales", ->
     it "returns a sorted set of compatible scales based on the scale and unit type provided", ->
       expect(VariantUnitManager.compatibleUnitScales(1, "weight")).toEqual [1.0, 1000.0, 1000000.0]
-      expect(VariantUnitManager.compatibleUnitScales(453.6, "weight")).toEqual [28.34952, 453.6]
+      expect(VariantUnitManager.compatibleUnitScales(453.6, "weight")).toEqual [28.35, 453.6]
 
   describe "variantUnitOptions", ->
     it "returns an array of options", ->
       expect(VariantUnitManager.variantUnitOptions()).toEqual [
         ["Weight (g)", "weight_1"],
-        ["Weight (oz)", "weight_28.34952"],
+        ["Weight (oz)", "weight_28.35"],
         ["Weight (lb)", "weight_453.6"],
         ["Weight (kg)", "weight_1000"],
         ["Weight (T)", "weight_1000000"],
diff --git a/spec/lib/open_food_network/option_value_namer_spec.rb b/spec/lib/open_food_network/option_value_namer_spec.rb
index 1e3ec2944c..88e215d5b6 100644
--- a/spec/lib/open_food_network/option_value_namer_spec.rb
+++ b/spec/lib/open_food_network/option_value_namer_spec.rb
@@ -83,12 +83,21 @@ module OpenFoodNetwork
         expect(subject.send(:option_value_value_unit)).to eq [1, 'kg']
       end
 
+      it "returns only values that are in the same measurement systems" do
+        p = double(:product, variant_unit: 'weight', variant_unit_scale: 1.0)
+        allow(v).to receive(:product) { p }
+        allow(v).to receive(:unit_value) { 500 }
+        # 500g would convert to > 1 pound, but we don't want the namer to use
+        # pounds since it's in a different measurement system.
+        expect(subject.send(:option_value_value_unit)).to eq [500, 'g']
+      end
+
       it "generates values for all weight scales" do
-        [[1.0, 'g'], [1000.0, 'kg'], [1_000_000.0, 'T']].each do |scale, unit|
+        [[1.0, 'g'], [28.35, 'oz'], [453.6, 'lb'], [1000.0, 'kg'], [1_000_000.0, 'T']].each do |scale, unit|
           p = double(:product, variant_unit: 'weight', variant_unit_scale: scale)
           allow(v).to receive(:product) { p }
-          allow(v).to receive(:unit_value) { 100 * scale }
-          expect(subject.send(:option_value_value_unit)).to eq [100, unit]
+          allow(v).to receive(:unit_value) { 10.0 * scale }
+          expect(subject.send(:option_value_value_unit)).to eq [10, unit]
         end
       end