diff --git a/phpBB/styles/prosilver/template/attachment.html b/phpBB/styles/prosilver/template/attachment.html
index cc5aacff2f..4c0a326f1e 100644
--- a/phpBB/styles/prosilver/template/attachment.html
+++ b/phpBB/styles/prosilver/template/attachment.html
@@ -70,12 +70,12 @@
 				<embed src="{_file.U_VIEW_LINK}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{_file.WIDTH}" height="{_file.HEIGHT}" play="true" loop="true" quality="high" allowscriptaccess="never" allownetworking="internal"></embed>
 			</object>
 		<!-- ELSEIF _file.S_QUICKTIME_FILE -->
-			<object id="qtstream_{_file.ATTACH_ID}" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab#version=6,0,2,0" width="0" height="16">
+			<object id="qtstream_{_file.ATTACH_ID}" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab#version=6,0,2,0" width="320" height="285">
 				<param name="src" value="{_file.U_DOWNLOAD_LINK}" />
 				<param name="controller" value="true" />
 				<param name="autoplay" value="false" />
 				<param name="type" value="video/quicktime" />
-				<embed name="qtstream_{_file.ATTACH_ID}" src="{_file.U_DOWNLOAD_LINK}" pluginspage="http://www.apple.com/quicktime/download/" enablejavascript="true" controller="true" width="0" height="16" type="video/quicktime" autoplay="false"></embed>
+				<embed name="qtstream_{_file.ATTACH_ID}" src="{_file.U_DOWNLOAD_LINK}" pluginspage="http://www.apple.com/quicktime/download/" enablejavascript="true" controller="true" width="320" height="285" type="video/quicktime" autoplay="false"></embed>
 			</object>
 		<!-- ELSEIF _file.S_RM_FILE -->
 			<object id="rmstream_{_file.ATTACH_ID}" classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" width="200" height="50">
diff --git a/phpBB/styles/subsilver2/template/attachment.html b/phpBB/styles/subsilver2/template/attachment.html
index 833bd4d55f..b5b547b2e6 100644
--- a/phpBB/styles/subsilver2/template/attachment.html
+++ b/phpBB/styles/subsilver2/template/attachment.html
@@ -67,12 +67,12 @@
 				<embed src="{_file.U_VIEW_LINK}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{_file.WIDTH}" height="{_file.HEIGHT}" play="true" loop="true" quality="high" allowscriptaccess="never" allownetworking="internal"></embed>
 			</object>
 		<!-- ELSEIF _file.S_QUICKTIME_FILE -->
-			<object id="qtstream_{_file.ATTACH_ID}" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab#version=6,0,2,0" width="0" height="16">
+			<object id="qtstream_{_file.ATTACH_ID}" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab#version=6,0,2,0" width="320" height="285">
 				<param name="src" value="{_file.U_DOWNLOAD_LINK}">
 				<param name="controller" value="true">
 				<param name="autoplay" value="false" />
 				<param name="type" value="video/quicktime">
-				<embed name="qtstream_{_file.ATTACH_ID}" src="{_file.U_DOWNLOAD_LINK}" pluginspage="http://www.apple.com/quicktime/download/" enablejavascript="true" controller="true" width="0" height="16" type="video/quicktime" autoplay="false"> 
+				<embed name="qtstream_{_file.ATTACH_ID}" src="{_file.U_DOWNLOAD_LINK}" pluginspage="http://www.apple.com/quicktime/download/" enablejavascript="true" controller="true" width="320" height="285" type="video/quicktime" autoplay="false"> 
 			</object>
 		<!-- ELSEIF _file.S_RM_FILE -->
 			<object id="rmstream_{_file.ATTACH_ID}" classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" width="200" height="50">