In older versions
.conversation-container .message {
margin: 10px;
display: flex;
font-size: 14px;
font-family: Roboto,serif;
flex-wrap: wrap;
}
in the css you can change font-size: 14px; to any size as you wish in latest versions
with latest version you have to use just check latest version
.rw-conversation-container .rw-message{
font-size: 14px;
}
