css.gg/icons/css/maximize.css

700+ Pure CSS, SVG & Figma UI Icons Available in SVG Sprite, styled-components, Black & White PNG, NPM & API + 6031 glyphs

.gg-maximize {
    box-sizing: border-box;
    position: relative;
    display: block;
    transform: scale(var(--ggs,1));
    width: 14px;
    height: 14px;
    box-shadow:
        -6px -6px 0 -4px,
        6px 6px 0 -4px,
        6px -6px 0 -4px,
        -6px 6px 0 -4px
}