JSFiddle - React, Tailwind, and code Playground

HTML

<a href=""class="btn btn-donate"><span>Donate Us</span></a>

CSS

.btn-donate{
    background: #97c83e;
    text-align: center;
    width: 149px;
    height: 148px;
    border-radius: 100%;
    display: inline-block;
    font-size: 35px;
    vertical-align:middle;
    color: white;
    font-weight: bold;
    text-decoration: none
}
a.btn.btn-donate span {
    display: inline-block;
    vertical-align: middle;
    }
a.btn.btn-donate:after {
    content: '';
    display: inline-block;
    vertical-align: middle;
    height: 100%;
}