Change text size

This is an example of how to increase or change text size in Better Messages interface:

:root{
    --bm-message-font-size: 16px;
    --bm-message-line-height: 20px;
}

.bp-messages-wrap .threads-list .thread .bm-info .last-message{
    font-size: 14px !important;
    line-height: 16px !important;
}

.bp-messages-wrap .threads-list .thread .bm-info .name+h4{
    font-size: 12px !important;
    line-height: 14px !important;
}

.bp-messages-wrap .threads-list .thread .bm-info .name {
    font-size: 15px;
    line-height: 15px;
}

.bp-messages-wrap .threads-list .thread .bm-info h4 {
    font-size: 15px;
    line-height: 15px;
}