diff --git a/addons/mail/static/src/core/common/message.xml b/addons/mail/static/src/core/common/message.xml
index 2e4733baf5f..18f10088cca 100644
--- a/addons/mail/static/src/core/common/message.xml
+++ b/addons/mail/static/src/core/common/message.xml
@@ -110,7 +110,7 @@
                                     t-if="message.attachments.length > 0"
                                     attachments="message.attachments.map((a) => a)"
                                     unlinkAttachment.bind="onClickAttachmentUnlink"
-                                    imagesHeight="300"/>
+                                    imagesHeight="message.attachments.length === 1 ? 300 : 75"/>
                                 <LinkPreviewList t-if="message.linkPreviews.length > 0 and store.hasLinkPreviewFeature and !message.linkPreviewSquash" linkPreviews="message.linkPreviews" deletable="deletable"/>
                             </div>
                             <t t-if="!message.hasTextContent or env.inChatWindow" t-call="mail.Message.actions"/>
diff --git a/addons/mail/static/src/core/web/chatter.xml b/addons/mail/static/src/core/web/chatter.xml
index 2a56b5141ed..1065a043ab2 100644
--- a/addons/mail/static/src/core/web/chatter.xml
+++ b/addons/mail/static/src/core/web/chatter.xml
@@ -98,7 +98,7 @@
                     <AttachmentList
                         attachments="attachments"
                         unlinkAttachment.bind="unlinkAttachment"
-                        imagesHeight="160"
+                        imagesHeight="100"
                     />
                     <FileUploader multiUpload="true" fileUploadClass="'o-mail-Chatter-fileUploader'" onUploaded.bind="onUploaded" onClick="(ev) => this.onClickAttachFile(ev)">
                         <t t-set-slot="toggler">