You can set new widths using define (constants) or by feeding width/height parameters on the avatar function calls in the templates – The BP codex should have examples Only use CSS if you’re reducing the dimensions but only if slightly as you’re still calling a larger size image where it may not be needed.
I changed the size of the code groups-loop.php
it did not work, which files I have to edit?
Which files have you tried to edit?
The standard file has this to generate the avatars:
bp_group_avatar( ‘type=thumb&width=50&height=50′ )
You can change type to ‘full’ and/or change the sizes , do so in a child theme copy of the file though to preserve your changes .
@Hugo
http://pastebin.com/E4SqsizF groups-loop.php
Css
`.messages.bp-wrapper .avatar,
.bp-wrapper .thread-avatar .avatar,
.item-list li .avatar
.bp-wrapper #whats-new-avatar .avatar { width: 50px; height: 50px; }
.bp-wrapper .item-list div.activity-avatar img,
.widget .swa-activity-list div.swa-activity-avatar img {
float: left;
width: 100px;
height: 100px;
margin: 3px 12px 3px 3px;
}`
And the avatar is displayed for a resolution of 35×35 
I do not understand this ;/
@Hugo
I’m sorry,i wrote it incorrectly. Avatar displays in resolution 100×100, but “buddypress” while addition changes its resolution in 35×35 in miniatures and because of that the picture displays very unintelligibly
@Hugo
Mayby in the database can change something?
ok it’s working, you can close the topic
problem was the file “/ wp-content/plugins/bp-template-pack/bpt-functions.php”
@Hugo
thank you for your help
But again, does not work, only fixed the avatar is displayed in groups and profil 128×128, the sections “THUMB” profiles are displayed in 35×35
I give up, I do not know what’s going on
For anyone wanting to do this I figured it out.
Step 1: Go to your child theme and find /groups/groups-loop.php find the code that says
<div class="item-avatar">
<a href="<?php bp_group_permalink(); ?>"><?php bp_group_avatar( 'type=thumb&width=45&height=45' ); ?></a>
</div>
Step 2:
You will replace that code with “group-header” code found here(groups/single/group-header.php)
<div id="item-header-avatar">
<a href="<?php bp_group_permalink(); ?>" title="<?php bp_group_name(); ?>">
<?php bp_group_avatar(); ?>
</a>
</div><!-- #item-header-avatar -->
That worked for me. Probably not the best route to altering it if you want to do a lot of CSS modifications to the “Group Forum Listing.” But if you want to just change the size to something larger this works.
