diff --git a/addons/mail/static/src/components/welcome_view/welcome_view.scss b/addons/mail/static/src/components/welcome_view/welcome_view.scss
deleted file mode 100644
index fbbce65d1af..00000000000
--- a/addons/mail/static/src/components/welcome_view/welcome_view.scss
+++ /dev/null
@@ -1,14 +0,0 @@
-.o_WelcomeView_joinButton {
-    height: 4rem;
-    width: 4rem;
-    font-size: 2em;
-    line-height: 4rem;
-}
-
-.o_WelcomeView_guestNameInputLabel {
-    font-size: $font-size-lg;
-}
-
-.o_WelcomeView_loggedAsStatus {
-    font-size: $font-size-lg;
-}
diff --git a/addons/mail/static/src/components/welcome_view/welcome_view.xml b/addons/mail/static/src/components/welcome_view/welcome_view.xml
index 6837183b9c4..bc316468de0 100644
--- a/addons/mail/static/src/components/welcome_view/welcome_view.xml
+++ b/addons/mail/static/src/components/welcome_view/welcome_view.xml
@@ -13,13 +13,15 @@
                     <MediaPreview t-if="welcomeView.mediaPreview" className="'mr-5'" record="welcomeView.mediaPreview"/>
                     <div class="d-flex flex-column justify-content-center">
                         <t t-if="messaging.currentGuest">
-                            <label class="o_WelcomeView_guestNameInputLabel text-center" t-att-for="welcomeView.guestNameInputUniqueId">What's your name?</label>
+                            <label class="o_WelcomeView_guestNameInputLabel text-center fs-4" t-att-for="welcomeView.guestNameInputUniqueId">What's your name?</label>
                             <input class="form-control mb-3" type="text" placeholder="Your name" t-att-name="welcomeView.guestNameInputUniqueId" t-att-id="welcomeView.guestNameInputUniqueId" t-att-value="welcomeView.pendingGuestName" t-ref="guestNameInput" t-on-input="welcomeView.onInputGuestNameInput" t-on-keydown="welcomeView.onKeydownGuestNameInput"/>
                         </t>
                         <t t-if="messaging.currentUser">
-                            <p class="o_WelcomeView_loggedAsStatus">Logged as <span t-esc="messaging.currentUser.nameOrDisplayName"/></p>
+                            <p class="o_WelcomeView_loggedAsStatus fs-4">Logged as <span t-esc="messaging.currentUser.nameOrDisplayName"/></p>
                         </t>
-                        <button class="o_WelcomeView_joinButton btn btn-success btn-lg align-self-end p-0 rounded-circle shadow fa fa-phone" title="Join Channel" t-att-disabled="welcomeView.isJoinButtonDisabled" t-on-click="welcomeView.onClickJoinButton"/>
+                        <button class="o_WelcomeView_joinButton btn btn-success fa-stack align-self-end p-0 rounded-circle fs-1 shadow" title="Join Channel" t-att-disabled="welcomeView.isJoinButtonDisabled" t-on-click="welcomeView.onClickJoinButton">
+                            <i class="fa fa-phone fa-stack"/>
+                        </button>
                     </div>
                 </div>
             </div>