$(document).ready(function() { // Wait a moment for the page to fully load setTimeout(function() { // Find size selectors with Small as an option $(".single-option-selector").each(function() { // Check if this selector has an Small option if ($(this).find("option[value='Small']").length > 0) { // Select Small and trigger the change event $(this).val("Small").trigger("change"); } }); }, 300); });