diff --git a/rero_ils/config.py b/rero_ils/config.py
index c87099e2e9..2f2b2db7d9 100644
--- a/rero_ils/config.py
+++ b/rero_ils/config.py
@@ -52,6 +52,7 @@
 
 from rero_ils.modules.api import IlsRecordIndexer
 from rero_ils.modules.loans.api import Loan
+from rero_ils.utils import get_agg_config
 
 from .modules.circ_policies.api import CircPolicy
 from .modules.documents.api import Document
@@ -703,33 +704,80 @@ def _(x):
             'status',
         ],
         'expand': ['document_type'],
+        'initialBucketSize': 5
     },
     'ptrn': {
         'order': [
             'roles'
         ],
-        'expand': ['roles']
+        'expand': ['roles'],
+        'initialBucketSize': 5
     },
     'pers': {
         'order': [
             'sources'
         ],
-        'expand': ['sources']
+        'expand': ['sources'],
+        'initialBucketSize': 5
     },
 }
 
+# Default number of results in facet
+RERO_ILS_DEFAULT_AGGREGATION_SIZE = 50
+
+# Number of aggregation by index name
+RERO_ILS_AGGREGATION_SIZE = {
+    'documents': 50
+}
+
 RECORDS_REST_FACETS = {
     'documents': dict(
         aggs=dict(
-            document_type=dict(terms=dict(field='type')),
-            library=dict(terms=dict(field='items.library_pid')),
-            author__en=dict(terms=dict(field='facet_authors_en')),
-            author__fr=dict(terms=dict(field='facet_authors_fr')),
-            author__de=dict(terms=dict(field='facet_authors_de')),
-            author__it=dict(terms=dict(field='facet_authors_it')),
-            language=dict(terms=dict(field='languages.language')),
-            subject=dict(terms=dict(field='facet_subjects')),
-            status=dict(terms=dict(field='items.status'))
+            document_type=partial(
+                get_agg_config,
+                index_name='documents',
+                field='type'
+            ),
+            library=partial(
+                get_agg_config,
+                index_name='documents',
+                field='items.library_pid'
+            ),
+            author__en=partial(
+                get_agg_config,
+                index_name='documents',
+                field='facet_authors_en'
+            ),
+            author__fr=partial(
+                get_agg_config,
+                index_name='documents',
+                field='facet_authors_fr'
+            ),
+            author__de=partial(
+                get_agg_config,
+                index_name='documents',
+                field='facet_authors_de'
+            ),
+            author__it=partial(
+                get_agg_config,
+                index_name='documents',
+                field='facet_authors_it'
+            ),
+            language=partial(
+                get_agg_config,
+                index_name='documents',
+                field='languages.language'
+            ),
+            subject=partial(
+                get_agg_config,
+                index_name='documents',
+                field='facet_subjects'
+            ),
+            status=partial(
+                get_agg_config,
+                index_name='items.status',
+                field='items.status'
+            )
         ),
         filters={
             _('document_type'): terms_filter('type'),
diff --git a/rero_ils/utils.py b/rero_ils/utils.py
index b5ff294b5d..f206767df5 100644
--- a/rero_ils/utils.py
+++ b/rero_ils/utils.py
@@ -65,3 +65,25 @@ def send_mail(subject, recipients, template, language, **context):
 def unique_list(data):
     """Unicity of list."""
     return list(dict.fromkeys(data))
+
+
+def get_agg_config(index_name, field):
+    """Get Elasticsearch aggregation term configuration.
+
+    This function allows to configure aggregation size per index name using
+    environnement variables.
+
+    :param index_name: name of Elasticsearch index
+    :param field: field name for the aggregation
+    :return: dict of Elasticsearch DSL aggregation configuration
+    """
+    from flask import current_app
+    return dict(terms=dict(
+        field=field,
+        size=current_app.config.get(
+            'RERO_ILS_AGGREGATION_SIZE', {}
+        ).get(
+            index_name,
+            current_app.config.get('RERO_ILS_DEFAULT_AGGREGATION_SIZE')
+        )
+    ))
diff --git a/ui/src/app/records/records.module.ts b/ui/src/app/records/records.module.ts
index 5b5fb42ddf..9e782f2911 100644
--- a/ui/src/app/records/records.module.ts
+++ b/ui/src/app/records/records.module.ts
@@ -48,6 +48,7 @@ import { PersonsSearchComponent } from './search/public-search/persons-search.co
 import { RefAuthorityComponent } from './editor/ref-authority/ref-authority.component';
 import { TypeaheadModule } from 'ngx-bootstrap/typeahead';
 import { RolesCheckboxesComponent } from './editor/roles-checkboxes/roles-checkboxes.component';
+import { AggregationComponent } from './search/aggregation/aggregation.component';
 
 @NgModule({
   declarations: [
@@ -79,7 +80,8 @@ import { RolesCheckboxesComponent } from './editor/roles-checkboxes/roles-checkb
     DocumentsSearchComponent,
     PersonsSearchComponent,
     RefAuthorityComponent,
-    RolesCheckboxesComponent
+    RolesCheckboxesComponent,
+    AggregationComponent
   ],
   imports: [
     CommonModule,
diff --git a/ui/src/app/records/search/aggregation/aggregation.component.html b/ui/src/app/records/search/aggregation/aggregation.component.html
new file mode 100644
index 0000000000..6ebe0c42ff
--- /dev/null
+++ b/ui/src/app/records/search/aggregation/aggregation.component.html
@@ -0,0 +1,34 @@
+<section class="mb-2" *ngIf="aggregation.buckets.length">
+  <a class="text-muted" [ngClass]="{'collapsed': !isOpen(aggregation.title)}"
+      data-toggle="collapse" href="#{{'agg_'+aggregation.title }}"
+      aria-expanded="false" aria-controls="libraryData">
+    <h6 class="mb-0 d-inline border-bottom pb-1 font-weight-bold"><i class="fa fa-caret-down" aria-hidden="true"></i> {{ aggregation.name | translate }}</h6>
+  </a>
+  <div class="collapse" [ngClass]="{'show': isOpen(aggregation.title)}" id="{{'agg_'+aggregation.title }}">
+    <ul class="list-unstyled mb-0">
+      <li class="form-check" *ngFor="let bucket of aggregation.buckets|slice:0:sizeOfBucket()">
+        <input class="form-check-input" type="checkbox" [checked]="isFiltered(aggregation.title, bucket.key)" (click)="aggFilter(aggregation.title, bucket.key) ">
+        <label class="form-check-label">
+          <span *ngIf="bucket.name">{{ bucket.name | translate }}</span>
+          <span *ngIf="!bucket.name">{{ bucket.key | translate }}</span> ({{ bucket.doc_count }})
+        </label>
+      </li>
+    </ul>
+    <div *ngIf="displayMoreAndLessLink()">
+      <a
+        *ngIf="moreMode"
+        href="#"
+        data-toggle="collapse"
+        (click)="setMoreMode(false)"
+        translate
+      >more…</a>
+      <a
+        *ngIf="!moreMode"
+        href="#"
+        data-toggle="collapse"
+        (click)="setMoreMode(true)"
+        translate
+      >less…</a>
+    </div>
+  </div>
+</section>
diff --git a/ui/src/app/records/search/aggregation/aggregation.component.scss b/ui/src/app/records/search/aggregation/aggregation.component.scss
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/ui/src/app/records/search/aggregation/aggregation.component.spec.ts b/ui/src/app/records/search/aggregation/aggregation.component.spec.ts
new file mode 100644
index 0000000000..6e21f7d425
--- /dev/null
+++ b/ui/src/app/records/search/aggregation/aggregation.component.spec.ts
@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { AggregationComponent } from './aggregation.component';
+
+describe('AggregationComponent', () => {
+  let component: AggregationComponent;
+  let fixture: ComponentFixture<AggregationComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ AggregationComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(AggregationComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});
diff --git a/ui/src/app/records/search/aggregation/aggregation.component.ts b/ui/src/app/records/search/aggregation/aggregation.component.ts
new file mode 100644
index 0000000000..d0ddfa45dc
--- /dev/null
+++ b/ui/src/app/records/search/aggregation/aggregation.component.ts
@@ -0,0 +1,61 @@
+import { Component, Input, Output, EventEmitter } from '@angular/core';
+
+@Component({
+  selector: 'app-aggregation',
+  templateUrl: './aggregation.component.html',
+  styleUrls: ['./aggregation.component.scss']
+})
+export class AggregationComponent {
+
+  @Input() aggFilters = null;
+  @Input() aggsSettings = null;
+  @Input() aggregation = null;
+
+  @Output() addAggFilter = new EventEmitter<{term: string, value: string}>();
+  @Output() removeAggFilter = new EventEmitter<{term: string, value: string}>();
+
+  private moreMode = true;
+
+  isFiltered(term: any, value?: any) {
+    if (value) {
+      const filterValue = `${term}=${value}`;
+      return this.aggFilters.some((val: any) => filterValue === val);
+    } else {
+      return this.aggFilters.some((val: any) => term === val.split('=')[0]);
+    }
+  }
+
+  aggFilter(term: string, value: string) {
+    if (this.isFiltered(term, value)) {
+      this.removeAggFilter.emit({term: term, value: value});
+    } else {
+      this.addAggFilter.emit({term: term, value: value});
+    }
+  }
+
+  isOpen(title: string) {
+    if (this.isFiltered(title)) {
+      return true;
+    }
+    if (this.aggsSettings.expand.some((value: any) => value === title)) {
+      return true;
+    }
+    return false;
+  }
+
+  sizeOfBucket() {
+    if (this.moreMode) {
+      return this.aggsSettings.initialBucketSize;
+    } else {
+      return this.aggregation.buckets.length;
+    }
+  }
+
+  displayMoreAndLessLink() {
+    return this.aggregation.buckets.length > this.aggsSettings.initialBucketSize;
+  }
+
+  setMoreMode(state: boolean) {
+    this.moreMode = state;
+  }
+}
diff --git a/ui/src/app/records/search/search.component.html b/ui/src/app/records/search/search.component.html
index 0fbb0bdde4..b37efe5a92 100644
--- a/ui/src/app/records/search/search.component.html
+++ b/ui/src/app/records/search/search.component.html
@@ -28,22 +28,13 @@ <h6>
 
   <aside *ngIf="aggregations && aggregations.length" class="col-md-4 col-lg-3 order-12 order-md-0">
     <div *ngFor="let item of aggregations">
-      <section class="mb-2" *ngIf="item.buckets.length" >
-        <a class="text-muted" [ngClass]="{'collapsed': !startOpen(item.title)}"
-           data-toggle="collapse" href="#{{'agg_'+item.title }}"
-           aria-expanded="false" aria-controls="libraryData">
-          <h6 class="mb-0 d-inline border-bottom pb-1 font-weight-bold"><i class="fa fa-caret-down" aria-hidden="true"></i> {{ item.name | translate }}</h6>
-        </a>
-        <ul class="list-unstyled collapse" [ngClass]="{'show': startOpen(item.title)}" id="{{'agg_'+item.title }}">
-          <li class="form-check" *ngFor="let bucket of item.buckets">
-            <input class="form-check-input" type="checkbox" [checked]="isFiltered(item.title, bucket.key)" (click)="aggFilter(item.title, bucket.key) ">
-            <label class="form-check-label">
-              <span *ngIf="bucket.name">{{ bucket.name | translate }}</span>
-              <span *ngIf="!bucket.name">{{ bucket.key | translate }}</span> ({{ bucket.doc_count }})
-            </label>
-          </li>
-        </ul>
-      </section>
+      <app-aggregation
+        [aggFilters]="aggFilters"
+        [aggsSettings]="aggsSettings"
+        [aggregation]="item"
+        (addAggFilter)="addAggFilter($event)"
+        (removeAggFilter)="removeAggFilter($event)"
+      ></app-aggregation>
     </div>
   </aside>
   <section [ngClass]="aggregations && aggregations.length ? 'col-md-8 col-lg-9' : 'col-12'">
diff --git a/ui/src/app/records/search/search.component.ts b/ui/src/app/records/search/search.component.ts
index cf6a960506..4bd3daa5f9 100644
--- a/ui/src/app/records/search/search.component.ts
+++ b/ui/src/app/records/search/search.component.ts
@@ -125,6 +125,7 @@ export class SearchComponent implements OnInit {
   public language = null;
   public permissions = null;
   onInitDone = false;
+
   constructor(
     protected recordsService: RecordsService,
     protected route: ActivatedRoute,
@@ -251,35 +252,6 @@ export class SearchComponent implements OnInit {
     });
   }
 
-  aggFilter(term, value) {
-    const filterValue = `${term}=${value}`;
-    if (this.isFiltered(term, value)) {
-      this.aggFilters = this.aggFilters.filter(val => val !== filterValue);
-    } else {
-      this.aggFilters.push(filterValue);
-    }
-    this.updateRoute();
-  }
-
-  isFiltered(term, value?) {
-    if (value) {
-      const filterValue = `${term}=${value}`;
-      return this.aggFilters.some(val => filterValue === val);
-    } else {
-      return this.aggFilters.some(val => term === val.split('=')[0]);
-    }
-  }
-
-  startOpen(title: string) {
-    if (this.isFiltered(title)) {
-      return true;
-    }
-    if (this.aggsSettings.expand.some(value => value === title)) {
-      return true;
-    }
-    return false;
-  }
-
   hasPermissionToCreate() {
     if (this.permissions
         && this.permissions.cannot_create
@@ -288,4 +260,20 @@ export class SearchComponent implements OnInit {
     }
     return true;
   }
+
+  removeAggFilter(event: any) {
+    this.aggFilters = this.aggFilters.filter(
+      val => val !== this.formatFilterValue(event)
+    );
+    this.updateRoute();
+  }
+
+  addAggFilter(event: any) {
+    this.aggFilters.push(this.formatFilterValue(event));
+    this.updateRoute();
+  }
+
+  formatFilterValue(object: {term: string, value: string}) {
+    return `${object.term}=${object.value}`;
+  }
 }
diff --git a/ui/src/assets/i18n/de.json b/ui/src/assets/i18n/de.json
index 7bf5c95c17..13120a560c 100644
--- a/ui/src/assets/i18n/de.json
+++ b/ui/src/assets/i18n/de.json
@@ -243,5 +243,7 @@
   "Documents": "Documents",
   "Persons": "Persons",
   "results": "Resultate",
-  "No result found.": "Keine Resultate gefunden"
-}
\ No newline at end of file
+  "No result found.": "Keine Resultate gefunden",
+  "more…": "Weiteres…",
+  "less…": "Weniger…"
+}
diff --git a/ui/src/assets/i18n/en.json b/ui/src/assets/i18n/en.json
index 97d1820b45..002583ec14 100644
--- a/ui/src/assets/i18n/en.json
+++ b/ui/src/assets/i18n/en.json
@@ -46,18 +46,18 @@
   "readingRoom": "readingRoom",
   "readingroom": "readingroom",
   "publicaccess": "publicaccess",
-  "fre": "fre",
-  "eng": "eng",
-  "ger": "ger",
-  "ita": "ita",
-  "lat": "lat",
-  "spa": "spa",
-  "ara": "ara",
-  "por": "por",
-  "rus": "rus",
-  "heb": "heb",
-  "jpn": "jpn",
-  "chi": "chi",
+  "fre": "French",
+  "eng": "English",
+  "ger": "German",
+  "ita": "Italian",
+  "lat": "Latin",
+  "spa": "Spanish",
+  "ara": "Arabic",
+  "por": "Portuguese",
+  "rus": "Russian",
+  "heb": "Hebrew",
+  "jpn": "Japanese",
+  "chi": "Chinese",
   "und": "Undefined",
   "patron": "patron",
   "librarian": "librarian",
diff --git a/ui/src/assets/i18n/en_US.json b/ui/src/assets/i18n/en_US.json
index 681660ff9f..6096ba8ba9 100644
--- a/ui/src/assets/i18n/en_US.json
+++ b/ui/src/assets/i18n/en_US.json
@@ -46,19 +46,19 @@
   "readingRoom": "readingRoom",
   "readingroom": "readingroom",
   "publicaccess": "publicaccess",
-  "fre": "fre",
-  "eng": "eng",
-  "ger": "ger",
-  "ita": "ita",
-  "lat": "lat",
-  "spa": "spa",
-  "ara": "ara",
-  "por": "por",
-  "rus": "rus",
-  "heb": "heb",
-  "jpn": "jpn",
-  "chi": "chi",
-  "und": "und",
+  "fre": "French",
+  "eng": "English",
+  "ger": "German",
+  "ita": "Italian",
+  "lat": "Latin",
+  "spa": "Spanish",
+  "ara": "Arabic",
+  "por": "Portuguese",
+  "rus": "Russian",
+  "heb": "Hebrew",
+  "jpn": "Japanese",
+  "chi": "Chinese",
+  "und": "Undefined",
   "patron": "patron",
   "librarian": "librarian",
   "system_librarian": "system librarian",
@@ -243,5 +243,7 @@
   "Documents": "Documents",
   "Persons": "Persons",
   "results": "results",
-  "No result found.": "No result found."
-}
\ No newline at end of file
+  "No result found.": "No result found.",
+  "more…": "more…",
+  "less…": "less…"
+}
diff --git a/ui/src/assets/i18n/fr.json b/ui/src/assets/i18n/fr.json
index 63f371e6c2..978f86d708 100644
--- a/ui/src/assets/i18n/fr.json
+++ b/ui/src/assets/i18n/fr.json
@@ -243,5 +243,7 @@
   "Documents": "Documents",
   "Persons": "Personnes",
   "results": "résultats",
-  "No result found.": "Aucun résultat n'a été trouvé."
-}
\ No newline at end of file
+  "No result found.": "Aucun résultat n'a été trouvé.",
+  "more…": "plus…",
+  "less…": "moins…"
+}
diff --git a/ui/src/assets/i18n/it.json b/ui/src/assets/i18n/it.json
index e01f1d4d2b..9962312c53 100644
--- a/ui/src/assets/i18n/it.json
+++ b/ui/src/assets/i18n/it.json
@@ -243,5 +243,7 @@
   "Documents": "Documenti",
   "Persons": "Persons",
   "results": "risultati",
-  "No result found.": "Nessun risultato trovato."
-}
\ No newline at end of file
+  "No result found.": "Nessun risultato trovato.",
+  "more…": "di più…",
+  "less…": "di meno…"
+}