Octagon

icf-solid icf-octagon

<i className="icf-solid icf-octagon" />

Unicode: 
Hex: \e039
HTML Entity: 

.my-icon::before {
    font-family: "Iconfyra 1";
    font-weight: 900;
    content: "\e039";
}

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" fill="currentColor">
    <path d="M162.80 0L349.20 0A31.00 31.00 0 0 1 371.12 9.08L502.92 140.88A31.00 31.00 0 0 1 512 162.80L512 349.20A31.00 31.00 0 0 1 502.92 371.12L371.12 502.92A31.00 31.00 0 0 1 349.20 512L162.80 512A31.00 31.00 0 0 1 140.88 502.92L9.08 371.12A31.00 31.00 0 0 1 0 349.20L0 162.80A31.00 31.00 0 0 1 9.08 140.88L140.88 9.08A31.00 31.00 0 0 1 162.80 0Z"/>
</svg>