diff --git a/res/css/views/elements/_RichText.scss b/res/css/views/elements/_RichText.scss
index e01b1f8938..cb0c2eacc1 100644
--- a/res/css/views/elements/_RichText.scss
+++ b/res/css/views/elements/_RichText.scss
@@ -6,11 +6,14 @@
 .mx_RoomPill,
 .mx_GroupPill,
 .mx_AtRoomPill {
-    border-radius: 16px;
-    display: inline-block;
-    height: 20px;
+    display: inline-flex;
+    align-items: center;
+    vertical-align: middle;
+    border-radius: $font-16px;
+    height: $font-16px;
     line-height: $font-20px;
-    padding-left: 5px;
+    padding-left: 0;
+    padding-right: 0.5em;
 }
 
 a.mx_Pill {
@@ -19,6 +22,11 @@ a.mx_Pill {
     overflow: hidden;
     vertical-align: text-bottom;
     max-width: calc(100% - 1ch);
+    height: $font-24px;
+}
+
+.mx_Pill {
+    padding: 0.3rem;
 }
 
 /* More specific to override `.markdown-body a` text-decoration */
@@ -31,8 +39,7 @@ a.mx_Pill {
 .mx_UserPill {
     color: $primary-fg-color;
     background-color: $other-user-pill-bg-color;
-    padding-right: 5px;
-}
+ }
 
 .mx_UserPill_selected {
     background-color: $accent-color !important;
@@ -45,7 +52,6 @@ a.mx_Pill {
 .mx_MessageComposer_input .mx_AtRoomPill {
     color: $accent-fg-color;
     background-color: $mention-user-pill-bg-color;
-    padding-right: 5px;
 }
 
 /* More specific to override `.markdown-body a` color */
@@ -55,15 +61,6 @@ a.mx_Pill {
 .mx_GroupPill {
     color: $accent-fg-color;
     background-color: $rte-room-pill-color;
-    padding-right: 5px;
-}
-
-/* More specific to override `.markdown-body a` color */
-.mx_EventTile_content .markdown-body a.mx_GroupPill,
-.mx_GroupPill {
-    color: $accent-fg-color;
-    background-color: $rte-group-pill-color;
-    padding-right: 5px;
 }
 
 .mx_EventTile_body .mx_UserPill,
@@ -77,8 +74,10 @@ a.mx_Pill {
 .mx_GroupPill .mx_BaseAvatar,
 .mx_AtRoomPill .mx_BaseAvatar {
     position: relative;
-    left: -3px;
-    top: 2px;
+    display: inline-flex;
+    align-items: center;
+    border-radius: 10rem;
+    margin-right: 0.24rem;
 }
 
 .mx_Markdown_BOLD {
diff --git a/res/css/views/rooms/_Autocomplete.scss b/res/css/views/rooms/_Autocomplete.scss
index e5316f5a46..a4aebdb708 100644
--- a/res/css/views/rooms/_Autocomplete.scss
+++ b/res/css/views/rooms/_Autocomplete.scss
@@ -31,9 +31,10 @@
 }
 
 .mx_Autocomplete_Completion_pill {
-    border-radius: 17px;
-    height: 34px;
-    padding: 0px 5px;
+    box-sizing: border-box;
+    border-radius: 2rem;
+    height: $font-34px;
+    padding: 0.4rem;
     display: flex;
     user-select: none;
     cursor: pointer;
@@ -42,7 +43,7 @@
 }
 
 .mx_Autocomplete_Completion_pill > * {
-    margin: 0 3px;
+    margin-right: 0.3rem;
 }
 
 /* styling for common completion elements */
diff --git a/res/css/views/rooms/_BasicMessageComposer.scss b/res/css/views/rooms/_BasicMessageComposer.scss
index e9013eb7b7..e126e523a6 100644
--- a/res/css/views/rooms/_BasicMessageComposer.scss
+++ b/res/css/views/rooms/_BasicMessageComposer.scss
@@ -46,22 +46,19 @@ limitations under the License.
 
         &.mx_BasicMessageComposer_input_shouldShowPillAvatar {
             span.mx_UserPill, span.mx_RoomPill {
-                padding-left: 21px;
                 position: relative;
 
                 // avatar psuedo element
                 &::before {
-                    position: absolute;
-                    left: 2px;
-                    top: 2px;
                     content: var(--avatar-letter);
-                    width: 16px;
-                    height: 16px;
+                    width: $font-16px;
+                    height: $font-16px;
+                    margin-right: 0.24rem;
                     background: var(--avatar-background), $avatar-bg-color;
                     color: $avatar-initial-color;
                     background-repeat: no-repeat;
-                    background-size: 16px;
-                    border-radius: 8px;
+                    background-size: $font-16px;
+                    border-radius: $font-16px;
                     text-align: center;
                     font-weight: normal;
                     line-height: $font-16px;
diff --git a/src/components/views/avatars/BaseAvatar.js b/src/components/views/avatars/BaseAvatar.js
index 3e3a2e6bd9..d9336a81e7 100644
--- a/src/components/views/avatars/BaseAvatar.js
+++ b/src/components/views/avatars/BaseAvatar.js
@@ -164,9 +164,9 @@ export default createReactClass({
             const initialLetter = AvatarLogic.getInitialLetter(name);
             const textNode = (
                 <span className="mx_BaseAvatar_initial" aria-hidden="true"
-                    style={{ fontSize: (width * 0.65) + "px",
-                    width: width + "px",
-                    lineHeight: height + "px" }}
+                    style={{ fontSize: (width * 0.65) / 15 + "rem",
+                    width: width / 15 + "rem",
+                    lineHeight: height / 15 + "rem" }}
                 >
                     { initialLetter }
                 </span>
@@ -174,7 +174,11 @@ export default createReactClass({
             const imgNode = (
                 <img className="mx_BaseAvatar_image" src={imageUrl}
                     alt="" title={title} onError={this.onError}
-                    width={width} height={height} aria-hidden="true" />
+                    aria-hidden="true"
+                    style={{
+                        width: width/15 + "rem",
+                        height: height/15 + "rem"
+                    }} />
             );
             if (onClick != null) {
                 return (
@@ -202,7 +206,10 @@ export default createReactClass({
                     src={imageUrl}
                     onClick={onClick}
                     onError={this.onError}
-                    width={width} height={height}
+                    style={{
+                        width: width/15 + "rem",
+                        height: height/15 + "rem"
+                    }}
                     title={title} alt=""
                     inputRef={inputRef}
                     {...otherProps} />
@@ -213,7 +220,10 @@ export default createReactClass({
                     className="mx_BaseAvatar mx_BaseAvatar_image"
                     src={imageUrl}
                     onError={this.onError}
-                    width={width} height={height}
+                    style={{
+                        width: width/15 + "rem",
+                        height: height/15 + "rem"
+                    }}
                     title={title} alt=""
                     ref={inputRef}
                     {...otherProps} />