Re-make of MooTools Element.measure for jQuery. Taken from - http://stackoverflow.com/a/7351956/617615

jquery.measure.js

!function(global) {
    function definition($) {
        $.fn.measure = function(fn) {
            var clone = $(this).clone(), result;

            clone.css({
                visibility: 'hidden',
                position: 'absolute'
            });
            clone.appendTo(document.body);

            if (typeof fn == 'function') {
                result = fn.apply(clone);
            }
            clone.remove();

            return result;
        };
    }

    if (typeof define === 'function' && define.amd) {
        define(['jquery'], definition);
    } else {
        definition(global.jQuery);
    }
}(this);



// Usage
/*
    var elem = $('<div></div>').html(someContent);

    var width = elem.measure(function() {
        return this.width();
    });
*/