diff --git a/backend/controllers/memberController.js b/backend/controllers/memberController.js
index cdf56c9..23b20cb 100644
--- a/backend/controllers/memberController.js
+++ b/backend/controllers/memberController.js
@@ -120,7 +120,8 @@ const generateMemberGallery = async (req, res) => {
     try {
         const { clubId } = req.params;
         const { authcode: userToken } = req.headers;
-        const result = await MemberService.generateMemberGallery(userToken, clubId);
+        const size = parseInt(req.query.size) || 200; // Default: 200x200
+        const result = await MemberService.generateMemberGallery(userToken, clubId, size);
         if (result.status === 200) {
             res.setHeader('Content-Type', 'image/png');
             res.setHeader('Cache-Control', 'no-store');
diff --git a/backend/services/memberService.js b/backend/services/memberService.js
index e3f157f..bf817a7 100644
--- a/backend/services/memberService.js
+++ b/backend/services/memberService.js
@@ -1070,10 +1070,14 @@ class MemberService {
         }
     }
 
-    async generateMemberGallery(userToken, clubId) {
+    async generateMemberGallery(userToken, clubId, size = 200) {
         try {
             await checkAccess(userToken, clubId);
 
+            // Validiere und setze tileDimension (nur 100, 150, 200 erlaubt)
+            const validSizes = [100, 150, 200];
+            const tileDimension = validSizes.includes(size) ? size : 200;
+
             const members = await Member.findAll({
                 where: {
                     clubId,
@@ -1130,8 +1134,6 @@ class MemberService {
                     error: 'Keine aktiven Mitglieder mit Bildern gefunden'
                 };
             }
-
-            const tileDimension = 200;
             // Maximale Breite für die Galerie (Dialog-Breite 900px - 32px Padding = 868px)
             const maxGalleryWidth = 868;
             // Berechne maximale Anzahl Spalten, die in die Breite passen
diff --git a/frontend/src/views/DiaryView.vue b/frontend/src/views/DiaryView.vue
index d727b45..49ff314 100644
--- a/frontend/src/views/DiaryView.vue
+++ b/frontend/src/views/DiaryView.vue
@@ -510,6 +510,14 @@
             @close="closeGalleryDialog"
         >
             <div class="gallery-dialog-content">
+                <div class="gallery-controls">
+                    <label for="gallery-size">Bildgröße:</label>
+                    <select id="gallery-size" v-model="gallerySize" @change="regenerateGallery" :disabled="galleryLoading">
+                        <option :value="100">100x100 px</option>
+                        <option :value="150">150x150 px</option>
+                        <option :value="200">200x200 px</option>
+                    </select>
+                </div>
                 <div v-if="galleryLoading" class="gallery-loading">Galerie wird erstellt…</div>
                 <div v-else-if="galleryImageUrl" class="gallery-image-wrapper">
                     <img :src="galleryImageUrl" alt="Mitglieder-Galerie" class="gallery-dialog-image">
@@ -667,6 +675,7 @@ export default {
             galleryLoading: false,
             galleryImageUrl: null,
             galleryError: '',
+            gallerySize: 200,
             editShowDropdown: false,
             editSearchResults: [],
             editSearchForId: null,
@@ -786,16 +795,22 @@ export default {
             }
         },
         async openGalleryDialog() {
+            if (!this.currentClub || this.galleryLoading) {
+                return;
+            }
+            this.showGalleryDialog = true;
+            await this.loadGallery();
+        },
+        async loadGallery() {
             if (!this.currentClub || this.galleryLoading) {
                 return;
             }
             this.galleryLoading = true;
             this.galleryError = '';
             try {
-                const response = await apiClient.get(`/clubmembers/gallery/${this.currentClub}`, { responseType: 'blob' });
+                const response = await apiClient.get(`/clubmembers/gallery/${this.currentClub}?size=${this.gallerySize}`, { responseType: 'blob' });
                 this.revokeGalleryImage();
                 this.galleryImageUrl = URL.createObjectURL(response.data);
-                this.showGalleryDialog = true;
             } catch (error) {
                 console.error('Fehler beim Erstellen der Mitglieder-Galerie:', error);
                 this.galleryError = error?.response?.data?.error || 'Galerie konnte nicht erstellt werden.';
@@ -804,6 +819,9 @@ export default {
                 this.galleryLoading = false;
             }
         },
+        async regenerateGallery() {
+            await this.loadGallery();
+        },
         closeGalleryDialog() {
             this.showGalleryDialog = false;
             this.revokeGalleryImage();
@@ -2474,6 +2492,7 @@ h3 {
 
 .gallery-dialog-content {
     display: flex;
+    flex-direction: column;
     justify-content: flex-start;
     align-items: flex-start;
     padding: 0;
@@ -2482,6 +2501,36 @@ h3 {
     overflow: auto;
 }
 
+.gallery-controls {
+    width: 100%;
+    padding: 12px 16px;
+    border-bottom: 1px solid var(--border-color, #ddd);
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    background: #f9f9f9;
+    flex-shrink: 0;
+}
+
+.gallery-controls label {
+    font-weight: 500;
+    color: var(--text-color, #333);
+}
+
+.gallery-controls select {
+    padding: 6px 12px;
+    border: 1px solid var(--border-color, #ddd);
+    border-radius: 4px;
+    font-size: 14px;
+    background: white;
+    cursor: pointer;
+}
+
+.gallery-controls select:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+}
+
 .gallery-image-wrapper {
     width: 100%;
     display: flex;