watch.twip-network.org/styles/pages/user/profile.css

.big-pfp {
    margin: 0;
    width: fit-content;
    overflow: hidden;
}

.big-pfp > img {
    border-radius: 5000px;
    transition: 0.3s;
}

.big-pfp:hover > img{
    border-radius: 0;
    transition: 0.3s;
}

.big-pfp img {
    width: 150px;
}