Botones circulares

 .button { -webkit-box-shadow: inset 0px 1px 0px rgba(255, 255, 255, 0.5), 0px 1px 2px rgba(0, 0, 0, 0.15); -moz-box-shadow: inset 0px 1px 0px rgba(255, 255, 255, 0.5), 0px 1px 2px rgba(0, 0, 0, 0.15); box-shadow: inset 0px 1px 0px rgba(255, 255, 255, 0.5), 0px 1px 2px rgba(0, 0, 0, 0.15); background-color: #eeeeee; background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #fbfbfb), color-stop(100%, #e1e1e1)); background: -webkit-linear-gradient(top, #fbfbfb, #e1e1e1); background: -moz-linear-gradient(top, #fbfbfb, #e1e1e1); background: -o-linear-gradient(top, #fbfbfb, #e1e1e1); background: linear-gradient(top, #fbfbfb, #e1e1e1); display: -moz-inline-stack; display: inline-block; vertical-align: middle; *vertical-align: auto; zoom: 1; *display: inline; border: 1px solid #d4d4d4; height: 32px; line-height: 32px; padding: 0px 25.6px; font-weight: 300; font-size: 14px; font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif; color: #666666; text-shadow: 0 1px 1px white; margin: 0; text-decoration: none; text-align: center; } .button:hover { background-color: #eeeeee; background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #ffffff), color-stop(100%, #dcdcdc)); background: -webkit-linear-gradient(top, #ffffff, #dcdcdc); background: -moz-linear-gradient(top, #ffffff, #dcdcdc); background: -o-linear-gradient(top, #ffffff, #dcdcdc); background: linear-gradient(top, #ffffff, #dcdcdc); } .button:active { -webkit-box-shadow: inset 0px 1px 3px rgba(0, 0, 0, 0.3), 0px 1px 0px white; -moz-box-shadow: inset 0px 1px 3px rgba(0, 0, 0, 0.3), 0px 1px 0px white; box-shadow: inset 0px 1px 3px rgba(0, 0, 0, 0.3), 0px 1px 0px white; text-shadow: 0px 1px 0px rgba(255, 255, 255, 0.4); background: #eeeeee; color: #bbbbbb; } input.button, button.button { height: 34px; cursor: pointer; } .button-block { display: block; } .button.disabled, .button.disabled:hover, .button.disabled:active, input.button:disabled, button.button:disabled { -webkit-box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.1); -moz-box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.1); box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.1); background: #EEE; border: 1px solid #dddddd; text-shadow: 0 1px 1px white; color: #CCC; cursor: default; } .button-wrap { background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #e3e3e3), color-stop(100%, #f2f2f2)); background: -webkit-linear-gradient(top, #e3e3e3, #f2f2f2); background: -moz-linear-gradient(top, #e3e3e3, #f2f2f2); background: -o-linear-gradient(top, #e3e3e3, #f2f2f2); background: linear-gradient(top, #e3e3e3, #f2f2f2); -webkit-border-radius: 200px; -moz-border-radius: 200px; -ms-border-radius: 200px; -o-border-radius: 200px; border-radius: 200px; -webkit-box-shadow: inset 0px 1px 3px rgba(0, 0, 0, 0.04); -moz-box-shadow: inset 0px 1px 3px rgba(0, 0, 0, 0.04); box-shadow: inset 0px 1px 3px rgba(0, 0, 0, 0.04); padding: 10px; display: inline-block; } .button-circle { -webkit-border-radius: 240px; -moz-border-radius: 240px; -ms-border-radius: 240px; -o-border-radius: 240px; border-radius: 240px; -webkit-box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 2px rgba(0, 0, 0, 0.2); -moz-box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 2px rgba(0, 0, 0, 0.2); box-shadow: inset 0px 1px 1px rgba(255, 255, 255, 0.5), 0px 1px 2px rgba(0, 0, 0, 0.2); width: 120px; line-height: 120px; height: 120px; padding: 0px; border-width: 4px; font-size: 18px; } .button-primary { background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #00b5e5), color-stop(100%, #008db2)); background: -webkit-linear-gradient(top, #00b5e5, #008db2); background: -moz-linear-gradient(top, #00b5e5, #008db2); background: -o-linear-gradient(top, #00b5e5, #008db2); background: linear-gradient(top, #00b5e5, #008db2); background-color: #00a1cb; border-color: #007998; color: white; text-shadow: 0 -1px 1px rgba(0, 40, 50, 0.35); } .button-primary:hover { background-color: #00a1cb; background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #00c9fe), color-stop(100%, #008db2)); background: -webkit-linear-gradient(top, #00c9fe, #008db2); background: -moz-linear-gradient(top, #00c9fe, #008db2); background: -o-linear-gradient(top, #00c9fe, #008db2); background: linear-gradient(top, #00c9fe, #008db2); } .button-primary:active { background: #1495b7; color: #005065; } .button-action { background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #8fcf00), color-stop(100%, #6b9c00)); background: -webkit-linear-gradient(top, #8fcf00, #6b9c00); background: -moz-linear-gradient(top, #8fcf00, #6b9c00); background: -o-linear-gradient(top, #8fcf00, #6b9c00); background: linear-gradient(top, #8fcf00, #6b9c00); background-color: #7db500; border-color: #5a8200; color: white; text-shadow: 0 -1px 1px rgba(19, 28, 0, 0.35); } .button-action:hover { background-color: #7db500; background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #a0e800), color-stop(100%, #6b9c00)); background: -webkit-linear-gradient(top, #a0e800, #6b9c00); background: -moz-linear-gradient(top, #a0e800, #6b9c00); background: -o-linear-gradient(top, #a0e800, #6b9c00); background: linear-gradient(top, #a0e800, #6b9c00); } .button-action:active { background: #76a312; color: #374f00; } .button-highlight { background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #fa9915), color-stop(100%, #d87e04)); background: -webkit-linear-gradient(top, #fa9915, #d87e04); background: -moz-linear-gradient(top, #fa9915, #d87e04); background: -o-linear-gradient(top, #fa9915, #d87e04); background: linear-gradient(top, #fa9915, #d87e04); background-color: #f18d05; border-color: #bf7004; color: white; text-shadow: 0 -1px 1px rgba(91, 53, 2, 0.35); } .button-highlight:hover { background-color: #f18d05; background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #fba42e), color-stop(100%, #d87e04)); background: -webkit-linear-gradient(top, #fba42e, #d87e04); background: -moz-linear-gradient(top, #fba42e, #d87e04); background: -o-linear-gradient(top, #fba42e, #d87e04); background: linear-gradient(top, #fba42e, #d87e04); } .button-highlight:active { background: #d8891e; color: #8d5303; } .button-caution { background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #e8543f), color-stop(100%, #d9331a)); background: -webkit-linear-gradient(top, #e8543f, #d9331a); background: -moz-linear-gradient(top, #e8543f, #d9331a); background: -o-linear-gradient(top, #e8543f, #d9331a); background: linear-gradient(top, #e8543f, #d9331a); background-color: #e54028; border-color: #c22d18; color: white; text-shadow: 0 -1px 1px rgba(103, 24, 13, 0.35); } .button-caution:hover { background-color: #e54028; background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #eb6855), color-stop(100%, #d9331a)); background: -webkit-linear-gradient(top, #eb6855, #d9331a); background: -moz-linear-gradient(top, #eb6855, #d9331a); background: -o-linear-gradient(top, #eb6855, #d9331a); background: linear-gradient(top, #eb6855, #d9331a); } .button-caution:active { background: #cd5240; color: #952312; } .button-royal { background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #99389f), color-stop(100%, #752a79)); background: -webkit-linear-gradient(top, #99389f, #752a79); background: -moz-linear-gradient(top, #99389f, #752a79); background: -o-linear-gradient(top, #99389f, #752a79); background: linear-gradient(top, #99389f, #752a79); background-color: #87318c; border-color: #632466; color: white; text-shadow: 0 -1px 1px rgba(26, 9, 27, 0.35); } .button-royal:hover { background-color: #87318c; background: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(0%, #ab3eb2), color-stop(100%, #752a79)); background: -webkit-linear-gradient(top, #ab3eb2, #752a79); background: -moz-linear-gradient(top, #ab3eb2, #752a79); background: -o-linear-gradient(top, #ab3eb2, #752a79); background: linear-gradient(top, #ab3eb2, #752a79); } .button-royal:active { background: #764479; color: #3e1740; }

 <a href="#" class="button button-circle">Silver Circle</a> <a href="#" class="button button-circle button-primary">Blue Circle</a> <a href="#" class="button button-circle button-action">Green Circle</a> <a href="#" class="button button-circle button-highlight">Orange Circle</a> <a href="#" class="button button-circle button-caution">Red Circle</a> <a href="#" class="button button-circle button-royal">Purple Circle</a>