square from coolicons in Line with regular corners. box, rectangle, checkbox, frame, stop, aspect, format, crop, instagram. Other styles and corners: @coolicons/<style>/<radius>/square with line, duocolor, duotone, fill or bulk and sharp or round. Leave out regular, like @coolicons/fill/square, and use @coolicons/square for line with regular corners.
pnpm dlx shadcn@latest add "https://coolicons.cool/r/square.json"