diff --git a/src/components/gallery.ts b/src/components/gallery.ts
index 80fabf2a..92cb52d8 100644
--- a/src/components/gallery.ts
+++ b/src/components/gallery.ts
@@ -11,7 +11,12 @@ import {
 } from 'lit';
 import { customElement, property } from 'lit/decorators.js';
 import galleryStyle from '../scss/gallery.scss';
-import { CameraConfig, frigateCardConfigDefaults, GalleryConfig } from '../types.js';
+import {
+  CameraConfig,
+  frigateCardConfigDefaults,
+  GalleryConfig,
+  THUMBNAIL_WIDTH_MAX
+} from '../types.js';
 import { stopEventFromActivatingCardWideActions } from '../utils/action.js';
 import {
   fetchChildMediaAndDispatchViewChange,
@@ -135,20 +140,28 @@ export class FrigateCardGalleryCore extends LitElement {
   }
 
   /**
-   * Handle gallery resize.
+   * Set gallery columns.
    */
-  protected _resizeHandler(): void {
+  protected _setColumnCount(): void {
     const thumbnailSize =
       this.galleryConfig?.controls.thumbnails.size ??
       frigateCardConfigDefaults.event_gallery.controls.thumbnails.size;
-    this.style.setProperty(
-      '--frigate-card-gallery-columns',
-      String(
-        !this.galleryConfig?.controls.thumbnails.show_details
-          ? Math.round(this.clientWidth / thumbnailSize)
-          : Math.max(1, Math.floor(this.clientWidth / THUMBNAIL_DETAILS_WIDTH_MIN)),
-      ),
-    );
+    const columns = this.galleryConfig?.controls.thumbnails.show_details
+      ? Math.max(1, Math.floor(this.clientWidth / THUMBNAIL_DETAILS_WIDTH_MIN))
+      : Math.max(
+          1,
+          Math.ceil(this.clientWidth / THUMBNAIL_WIDTH_MAX),
+          Math.ceil(this.clientWidth / thumbnailSize),
+        );
+
+    this.style.setProperty('--frigate-card-gallery-columns', String(columns));
+  }
+
+  /**
+   * Handle gallery resize.
+   */
+  protected _resizeHandler(): void {
+    this._setColumnCount();
   }
 
   /**
@@ -174,6 +187,7 @@ export class FrigateCardGalleryCore extends LitElement {
       } else {
         this.removeAttribute('details');
       }
+      this._setColumnCount();
       if (this.galleryConfig?.controls.thumbnails.size) {
         this.style.setProperty(
           '--frigate-card-thumbnail-size',
@@ -230,7 +244,6 @@ export class FrigateCardGalleryCore extends LitElement {
                       stopEventFromActivatingCardWideActions(ev);
                     }}
                     outlined=""
-                    class="foo"
                   >
                     <div>${child.title}</div>
                   </ha-card>
diff --git a/src/components/thumbnail-carousel.ts b/src/components/thumbnail-carousel.ts
index d62d1711..54b515da 100644
--- a/src/components/thumbnail-carousel.ts
+++ b/src/components/thumbnail-carousel.ts
@@ -2,7 +2,6 @@ import { EmblaOptionsType } from 'embla-carousel';
 import { CSSResultGroup, html, PropertyValues, TemplateResult, unsafeCSS } from 'lit';
 import { customElement, property, state } from 'lit/decorators.js';
 import { classMap } from 'lit/directives/class-map.js';
-import { ifDefined } from 'lit/directives/if-defined.js';
 import thumbnailCarouselStyle from '../scss/thumbnail-carousel.scss';
 import type { FrigateBrowseMediaSource, ThumbnailsControlConfig } from '../types.js';
 import { stopEventFromActivatingCardWideActions } from '../utils/action.js';
@@ -120,6 +119,21 @@ export class FrigateCardThumbnailCarousel extends FrigateCardCarousel {
     return slides;
   }
 
+  /**
+   * Called when an update will occur.
+   * @param changedProps The changed properties
+   */
+  protected willUpdate(changedProps: PropertyValues): void {
+    if (changedProps.has('_config')) {
+      if (this._config?.size) {
+        this.style.setProperty(
+          '--frigate-card-thumbnail-size',
+          `${this._config.size}px`,
+        );
+      }
+    }
+  }
+
   /**
    * The updated lifecycle callback for this element.
    * @param changedProperties The properties that were changed in this render.
@@ -170,7 +184,6 @@ export class FrigateCardThumbnailCarousel extends FrigateCardCarousel {
       .childIndex=${childIndex}
       ?details=${this._config?.show_details}
       ?controls=${this._config?.show_controls}
-      thumbnail_size=${ifDefined(this._config?.size)}
       class="${classMap(classes)}"
       @click=${(ev) => {
         if (this._carousel && this._carousel.clickAllowed()) {
diff --git a/src/components/thumbnail.ts b/src/components/thumbnail.ts
index cc5676bb..e052440f 100644
--- a/src/components/thumbnail.ts
+++ b/src/components/thumbnail.ts
@@ -128,11 +128,6 @@ export class FrigateCardThumbnail extends LitElement {
   @property({ attribute: true, type: Boolean })
   public controls = false;
 
-  @property({ attribute: true, type: Number })
-  set thumbnail_size(size: number) {
-    this.style.setProperty('--frigate-card-thumbnail-size', `${size}px`);
-  }
-
   // ============================
   // Data-binding based interface
   // ============================
diff --git a/src/components/timeline.ts b/src/components/timeline.ts
index 0fd14ee0..67784235 100644
--- a/src/components/timeline.ts
+++ b/src/components/timeline.ts
@@ -497,9 +497,6 @@ export class FrigateCardTimelineCore extends LitElement {
       return '';
     }
 
-    const thumbnailSizeAttr = this.timelineConfig
-      ? `thumbnail_size="${this.timelineConfig.controls.thumbnails.size}"`
-      : '';
     const eventAttr = source.frigate?.event
       ? `event='${JSON.stringify(source.frigate.event)}'`
       : '';
@@ -516,7 +513,6 @@ export class FrigateCardTimelineCore extends LitElement {
         thumbnail="${source.thumbnail}"
         label="${source.title}"
         ${eventAttr}
-        ${thumbnailSizeAttr}
       >
       </frigate-card-thumbnail>`;
   }
@@ -1022,7 +1018,6 @@ export class FrigateCardTimelineCore extends LitElement {
               'thumbnail',
               'label',
               'event',
-              'thumbnail_size',
             ],
             div: ['title'],
             span: ['style'],
@@ -1152,6 +1147,21 @@ export class FrigateCardTimelineCore extends LitElement {
     return newContext || null;
   }
 
+  /**
+   * Called when an update will occur.
+   * @param changedProps The changed properties
+   */
+   protected willUpdate(changedProps: PropertyValues): void {
+    if (changedProps.has('timelineConfig')) {
+      if (this.timelineConfig?.controls.thumbnails.size) {
+        this.style.setProperty(
+          '--frigate-card-thumbnail-size',
+          `${this.timelineConfig.controls.thumbnails.size}px`,
+        );
+      }
+    }
+  }
+
   /**
    * Called when the component is updated.
    * @param changedProperties The changed properties if any.
diff --git a/src/scss/carousel.scss b/src/scss/carousel.scss
index 32dc9147..d72a6def 100644
--- a/src/scss/carousel.scss
+++ b/src/scss/carousel.scss
@@ -55,7 +55,6 @@ img,video {
 
 .embla__slide {
   position: relative;
-  height: 100%;
   overflow: visible;
 }
 :host([direction=vertical]) .embla__slide {
diff --git a/src/scss/const.scss b/src/scss/const.scss
index 38cc2113..8c612c78 100644
--- a/src/scss/const.scss
+++ b/src/scss/const.scss
@@ -1,5 +1,4 @@
 :host {
-  --frigate-card-thumbnail-size: 100px;
   --frigate-card-thumbnail-size-max: 175px;
   --frigate-card-thumbnail-details-width: calc(var(--frigate-card-thumbnail-size) + 200px);
 }
\ No newline at end of file
diff --git a/src/scss/gallery.scss b/src/scss/gallery.scss
index 2777fd32..09c63520 100644
--- a/src/scss/gallery.scss
+++ b/src/scss/gallery.scss
@@ -1,8 +1,6 @@
-@use "const.scss";
-
 :host {
   width: 100%;
-  height: 100%;
+  height: auto;
   overflow: auto;
 
   // Hide scrollbar: IE and Edge
@@ -16,8 +14,8 @@
 
   display: grid;
   grid-template-columns: repeat(var(--frigate-card-gallery-columns), minmax(0, 1fr));
-  grid-auto-rows: var(--frigate-card-thumbnail-size);
-  grid-column-gap: var(--frigate-card-gallery-gap);
+  grid-auto-rows: 1fr;
+  gap: var(--frigate-card-gallery-gap);
 }
 
 // Hide scrollbar for Chrome, Safari and Opera
@@ -32,16 +30,21 @@ ha-card {
   box-sizing: border-box;
   text-align: center;
   opacity: 0.7;
-  color: var(--secondary-text-color, white);
-  border: 2px ridge var(--secondary-text-color, black);
+  color: var(--primary-text-color, white);
+  border: 2px ridge var(--primary-text-color, black);
   border-radius: 5px;
   background-color: var(--primary-background-color, black);
   padding: 10px;
   line-height: 1;
   overflow: hidden;
+
+  transition: transform 0.2s linear;
+}
+ha-card:hover {
+  transform: scale(1.04)
 }
 
-:host(:not([details])) ha-card,
-:host(:not([details])) frigate-card-thumbnail {
-  aspect-ratio: 1 / 1;
-}
+ha-card, frigate-card-thumbnail {
+  height: 100%;
+  max-height: var(--frigate-card-thumbnail-size);
+}
\ No newline at end of file
diff --git a/src/scss/media-carousel.scss b/src/scss/media-carousel.scss
index 5611628f..d0d0142d 100644
--- a/src/scss/media-carousel.scss
+++ b/src/scss/media-carousel.scss
@@ -4,4 +4,5 @@
 
 .embla__slide {
   flex: 0 0 100%;
+  height: 100%;
 }
\ No newline at end of file
diff --git a/src/scss/thumbnail-carousel.scss b/src/scss/thumbnail-carousel.scss
index 033d09fd..71f70170 100644
--- a/src/scss/thumbnail-carousel.scss
+++ b/src/scss/thumbnail-carousel.scss
@@ -1,13 +1,13 @@
-@use "const.scss";
+@use 'const.scss';
 
 :host {
-  --frigate-card-carousel-thumbnail-opacity: 1.0;
+  --frigate-card-carousel-thumbnail-opacity: 1;
 }
 
-:host([direction=vertical]) {
+:host([direction='vertical']) {
   height: 100%;
 }
-:host([direction=horizontal]) {
+:host([direction='horizontal']) {
   // In fullscreen mode, without explicitly setting the height to auto Chrome
   // will construct a stylesheet with 100% height.
   height: auto;
@@ -19,14 +19,13 @@
   transition: opacity 0.6s ease;
 }
 .embla__slide.slide-selected {
-  opacity: 1.0;
+  opacity: 1;
 }
 
-frigate-card-thumbnail[details] {
-  width: var(--frigate-card-thumbnail-details-width);
-  height: var(--frigate-card-thumbnail-size);
-}
-frigate-card-thumbnail:not([details]) {
+frigate-card-thumbnail {
   width: var(--frigate-card-thumbnail-size);
   height: var(--frigate-card-thumbnail-size);
-}
\ No newline at end of file
+}
+frigate-card-thumbnail[details] {
+  width: var(--frigate-card-thumbnail-details-width);
+}
diff --git a/src/scss/thumbnail-feature-event.scss b/src/scss/thumbnail-feature-event.scss
index 49100d67..790147ff 100644
--- a/src/scss/thumbnail-feature-event.scss
+++ b/src/scss/thumbnail-feature-event.scss
@@ -1,24 +1,24 @@
 :host {
   display: block;
-  height: 100%;
+  max-width: var(--frigate-card-thumbnail-size);
+  max-height: var(--frigate-card-thumbnail-size);
   overflow: hidden;
+
+  // Restrict images to a maximum of thumbnail size.
+  aspect-ratio: 1 / 1;
 }
 
 img, ha-icon {
   border-radius: var(--ha-card-border-radius, 4px);
 
-  max-width: var(--frigate-card-thumbnail-size-max);
-  max-height: var(--frigate-card-thumbnail-size-max);
+  width: 100%;
+  height: 100%;
 
   // Not 'contain' as some thumbnails may vary in aspect-ratio slightly and
   // should be clipped to fill the thumbnail div whilst maintaining
   // aspect-ratio.
   object-fit: cover;
 
-  // Restrict images to a maximum of thumbnail size.
-  aspect-ratio: 1 / 1;
-  height: 100%;
-
   transition: transform 0.2s linear;
 }
 
diff --git a/src/scss/thumbnail-feature-recording.scss b/src/scss/thumbnail-feature-recording.scss
index 590ec46c..a165b971 100644
--- a/src/scss/thumbnail-feature-recording.scss
+++ b/src/scss/thumbnail-feature-recording.scss
@@ -4,11 +4,10 @@
   justify-content: center;
   align-items: center;
 
-  height: 100%;
   aspect-ratio: 1 / 1;
   overflow: hidden;
-  max-width: var(--frigate-card-thumbnail-size-max);
-  max-height: var(--frigate-card-thumbnail-size-max);
+  max-width: var(--frigate-card-thumbnail-size);
+  max-height: var(--frigate-card-thumbnail-size);
   padding: 10px;
 
   border: 1px solid var(--secondary-color);
@@ -27,4 +26,4 @@
 
 div.title {
   font-size: 1.5rem;
-}
\ No newline at end of file
+}
diff --git a/src/scss/thumbnail.scss b/src/scss/thumbnail.scss
index 22c6b23a..35a443a8 100644
--- a/src/scss/thumbnail.scss
+++ b/src/scss/thumbnail.scss
@@ -1,5 +1,3 @@
-@use "const.scss";
-
 :host {
   display: flex;
   flex-direction: row;
@@ -7,6 +5,11 @@
 
   // Ensure control icons are relative to the thumbnail.
   position: relative;
+  overflow: hidden;
+}
+
+:host(:not([details])) {
+  aspect-ratio: 1 / 1;
 }
 
 :host([details]) {
diff --git a/src/scss/timeline-core.scss b/src/scss/timeline-core.scss
index 1230e864..84c4cab0 100644
--- a/src/scss/timeline-core.scss
+++ b/src/scss/timeline-core.scss
@@ -1,5 +1,6 @@
 @use 'vis-timeline/dist/vis-timeline-graph2d.css';
 @use 'drawer';
+@use 'const.scss';
 
 :host {
   width: 100%;
@@ -15,6 +16,14 @@
   position: relative;
 }
 
+frigate-card-thumbnail {
+  height: var(--frigate-card-thumbnail-size);
+  width: var(--frigate-card-thumbnail-size);
+}
+frigate-card-thumbnail[details] {
+  width: var(--frigate-card-thumbnail-details-width);
+}
+
 div.timeline {
   flex: 1;
 }