function createVariantListCustom(product, variant_name) {
        var variants = [variant_name,[]];
        for (var i = 0; i < product.vra.length; i++) {
            var variant = product.vra[i][1].find(function (element) {
                return element[0] === variant_name;
            });
            var sellable = product.vra[i][1].find(function (element) {
                return element[0] === "sellable";
            });
            if(variant && typeof variant[1][0] !== "undefined"){
                if(!variants[1].find(function (element) { return element[1] === variant[1][0]})){
                    variants[1].push([product.vra[i][0],variant[1][0],sellable]);
                }
            }
        }
            var SIZE_ARRAY = ["os", "all size", "xs", "extra small", "s", "small", "m", "medium", "l", "large", "xl", "extra large", "2xl", "3xl", "4xl", "5xl"];
            var endIndex = SIZE_ARRAY.length;
            var size_collection = [];
            for (var i = 0; i < variants[1].length ; i++) {
                if(SIZE_ARRAY.indexOf(variants[1][i][1].toLowerCase()) > -1){
                    size_collection[SIZE_ARRAY.indexOf(variants[1][i][1].toLowerCase())] = variants[1][i];
                } else {
                    size_collection[endIndex++] = variants[1][i];
                }
            }
            variants[1] = size_collection.filter(function (a) {return typeof a !== "undefined"});
        return variants;
    }