diff --git a/frontend/src/Settings/Quality/Definition/QualityDefinition.css.d.ts b/frontend/src/Settings/Quality/Definition/QualityDefinition.css.d.ts
index 15079647b..56c2f5d98 100644
--- a/frontend/src/Settings/Quality/Definition/QualityDefinition.css.d.ts
+++ b/frontend/src/Settings/Quality/Definition/QualityDefinition.css.d.ts
@@ -1,9 +1,16 @@
 // This file is automatically generated.
 // Please do not change this file!
 interface CssExports {
+  'megabytesPerMinute': string;
   'quality': string;
   'qualityDefinition': string;
+  'sizeInput': string;
+  'sizeLimit': string;
+  'sizes': string;
+  'slider': string;
+  'thumb': string;
   'title': string;
+  'track': string;
 }
 export const cssExports: CssExports;
 export default cssExports;
diff --git a/frontend/src/Settings/Quality/Definition/QualityDefinitions.css.d.ts b/frontend/src/Settings/Quality/Definition/QualityDefinitions.css.d.ts
index 6342b91dc..72ba4f3a3 100644
--- a/frontend/src/Settings/Quality/Definition/QualityDefinitions.css.d.ts
+++ b/frontend/src/Settings/Quality/Definition/QualityDefinitions.css.d.ts
@@ -3,8 +3,11 @@
 interface CssExports {
   'definitions': string;
   'header': string;
-  'notice': string;
+  'megabytesPerMinute': string;
   'quality': string;
+  'sizeLimit': string;
+  'sizeLimitHelpText': string;
+  'sizeLimitHelpTextContainer': string;
   'title': string;
 }
 export const cssExports: CssExports;
diff --git a/src/NzbDrone.Core.Test/DecisionEngineTests/PrioritizeDownloadDecisionFixture.cs b/src/NzbDrone.Core.Test/DecisionEngineTests/PrioritizeDownloadDecisionFixture.cs
index 2c9c05362..9c2120212 100644
--- a/src/NzbDrone.Core.Test/DecisionEngineTests/PrioritizeDownloadDecisionFixture.cs
+++ b/src/NzbDrone.Core.Test/DecisionEngineTests/PrioritizeDownloadDecisionFixture.cs
@@ -22,21 +22,35 @@ namespace NzbDrone.Core.Test.DecisionEngineTests
     [TestFixture]
     public class PrioritizeDownloadDecisionFixture : CoreTest<DownloadDecisionPriorizationService>
     {
+        private Series _series;
+
         [SetUp]
         public void Setup()
         {
             GivenPreferredDownloadProtocol(DownloadProtocol.Usenet);
 
-            Mocker.GetMock<IQualityDefinitionService>()
-                .Setup(s => s.Get(It.IsAny<Quality>()))
-                .Returns(new QualityDefinition { PreferredSize = null });
+            _series = Builder<Series>.CreateNew()
+                .With(e => e.Runtime = 60)
+                .With(e => e.QualityProfile = new QualityProfile
+                {
+                    Items = Qualities.QualityFixture.GetDefaultQualities()
+                })
+                .Build();
         }
 
-        private void GivenPreferredSize(double? size)
+        private void GivenPreferredSize(QualityProfile qualityProfile, double? size)
         {
-            Mocker.GetMock<IQualityDefinitionService>()
-                .Setup(s => s.Get(It.IsAny<Quality>()))
-                .Returns(new QualityDefinition { PreferredSize = size });
+            foreach (var qualityOrGroup in qualityProfile.Items)
+            {
+                if (qualityOrGroup.Quality != null)
+                {
+                    qualityOrGroup.PreferredSize = size;
+                }
+                else
+                {
+                    qualityOrGroup.Items.ForEach(i => i.PreferredSize = size);
+                }
+            }
         }
 
         private Episode GivenEpisode(int id)
@@ -63,13 +77,7 @@ namespace NzbDrone.Core.Test.DecisionEngineTests
             remoteEpisode.Release.DownloadProtocol = downloadProtocol;
             remoteEpisode.Release.IndexerPriority = indexerPriority;
 
-            remoteEpisode.Series = Builder<Series>.CreateNew()
-                                                  .With(e => e.Runtime = 60)
-                                                  .With(e => e.QualityProfile = new QualityProfile
-                                                  {
-                                                      Items = Qualities.QualityFixture.GetDefaultQualities()
-                                                  })
-                                                  .Build();
+            remoteEpisode.Series = _series;
 
             return remoteEpisode;
         }
@@ -176,7 +184,7 @@ namespace NzbDrone.Core.Test.DecisionEngineTests
         public void should_order_by_closest_to_preferred_size_if_both_under()
         {
             // 200 MB/Min * 60 Min Runtime = 12000 MB
-            GivenPreferredSize(200);
+            GivenPreferredSize(_series.QualityProfile.Value, 200);
 
             var remoteEpisodeSmall = GivenRemoteEpisode(new List<Episode> { GivenEpisode(1) }, new QualityModel(Quality.HDTV720p), Language.English, size: 1200.Megabytes(), age: 1);
             var remoteEpisodeLarge = GivenRemoteEpisode(new List<Episode> { GivenEpisode(1) }, new QualityModel(Quality.HDTV720p), Language.English, size: 10000.Megabytes(), age: 1);
@@ -193,7 +201,7 @@ namespace NzbDrone.Core.Test.DecisionEngineTests
         public void should_order_by_closest_to_preferred_size_if_preferred_is_in_between()
         {
             // 46 MB/Min * 60 Min Runtime = 6900 MB
-            GivenPreferredSize(46);
+            GivenPreferredSize(_series.QualityProfile.Value, 46);
 
             var remoteEpisode1 = GivenRemoteEpisode(new List<Episode> { GivenEpisode(1) }, new QualityModel(Quality.HDTV720p), Language.English, size: 500.Megabytes(), age: 1);
             var remoteEpisode2 = GivenRemoteEpisode(new List<Episode> { GivenEpisode(1) }, new QualityModel(Quality.HDTV720p), Language.English, size: 2000.Megabytes(), age: 1);
diff --git a/src/NzbDrone.Core/DecisionEngine/DownloadDecisionComparer.cs b/src/NzbDrone.Core/DecisionEngine/DownloadDecisionComparer.cs
index 64277b34e..f5996bf58 100644
--- a/src/NzbDrone.Core/DecisionEngine/DownloadDecisionComparer.cs
+++ b/src/NzbDrone.Core/DecisionEngine/DownloadDecisionComparer.cs
@@ -14,16 +14,14 @@ namespace NzbDrone.Core.DecisionEngine
     {
         private readonly IConfigService _configService;
         private readonly IDelayProfileService _delayProfileService;
-        private readonly IQualityDefinitionService _qualityDefinitionService;
 
         public delegate int CompareDelegate(DownloadDecision x, DownloadDecision y);
         public delegate int CompareDelegate<TSubject, TValue>(DownloadDecision x, DownloadDecision y);
 
-        public DownloadDecisionComparer(IConfigService configService, IDelayProfileService delayProfileService, IQualityDefinitionService qualityDefinitionService)
+        public DownloadDecisionComparer(IConfigService configService, IDelayProfileService delayProfileService)
         {
             _configService = configService;
             _delayProfileService = delayProfileService;
-            _qualityDefinitionService = qualityDefinitionService;
         }
 
         public int Compare(DownloadDecision x, DownloadDecision y)
diff --git a/src/NzbDrone.Core/DecisionEngine/DownloadDecisionPriorizationService.cs b/src/NzbDrone.Core/DecisionEngine/DownloadDecisionPriorizationService.cs
index 44808ee05..69c49c480 100644
--- a/src/NzbDrone.Core/DecisionEngine/DownloadDecisionPriorizationService.cs
+++ b/src/NzbDrone.Core/DecisionEngine/DownloadDecisionPriorizationService.cs
@@ -2,7 +2,6 @@ using System.Collections.Generic;
 using System.Linq;
 using NzbDrone.Core.Configuration;
 using NzbDrone.Core.Profiles.Delay;
-using NzbDrone.Core.Qualities;
 
 namespace NzbDrone.Core.DecisionEngine
 {
@@ -15,13 +14,11 @@ namespace NzbDrone.Core.DecisionEngine
     {
         private readonly IConfigService _configService;
         private readonly IDelayProfileService _delayProfileService;
-        private readonly IQualityDefinitionService _qualityDefinitionService;
 
-        public DownloadDecisionPriorizationService(IConfigService configService, IDelayProfileService delayProfileService, IQualityDefinitionService qualityDefinitionService)
+        public DownloadDecisionPriorizationService(IConfigService configService, IDelayProfileService delayProfileService)
         {
             _configService = configService;
             _delayProfileService = delayProfileService;
-            _qualityDefinitionService = qualityDefinitionService;
         }
 
         public List<DownloadDecision> PrioritizeDecisions(List<DownloadDecision> decisions)
@@ -29,7 +26,7 @@ namespace NzbDrone.Core.DecisionEngine
             return decisions.Where(c => c.RemoteEpisode.Series != null)
                             .GroupBy(c => c.RemoteEpisode.Series.Id, (seriesId, downloadDecisions) =>
                                 {
-                                    return downloadDecisions.OrderByDescending(decision => decision, new DownloadDecisionComparer(_configService, _delayProfileService, _qualityDefinitionService));
+                                    return downloadDecisions.OrderByDescending(decision => decision, new DownloadDecisionComparer(_configService, _delayProfileService));
                                 })
                             .SelectMany(c => c)
                             .Union(decisions.Where(c => c.RemoteEpisode.Series == null))