diff --git a/web/modals/threads/subchannels/subchannels-modal.css b/web/modals/threads/subchannels/subchannels-modal.css
--- a/web/modals/threads/subchannels/subchannels-modal.css
+++ b/web/modals/threads/subchannels/subchannels-modal.css
@@ -5,6 +5,8 @@
   line-height: var(--line-height-text);
   color: var(--subchannels-modal-color);
   row-gap: 8px;
+  width: 383px;
+  height: 458px;
 }
 
 div.noSubchannels {
diff --git a/web/modals/threads/subchannels/subchannels-modal.react.js b/web/modals/threads/subchannels/subchannels-modal.react.js
--- a/web/modals/threads/subchannels/subchannels-modal.react.js
+++ b/web/modals/threads/subchannels/subchannels-modal.react.js
@@ -147,6 +147,7 @@
       name="Subchannels"
       searchPlaceholder="Search"
       onClose={onClose}
+      size="fit-content"
     >
       {subchannelsContent}
     </SearchModal>