Liankeke2016 via Amazon offers Prime members the Yahangkj Kids' Cat Socks 5-Pack in five styles (Yh-8 pictured) for $7.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's a savings of $5 and the lowest total price we could find. They're available in sizes 3 years to 12 years, although not in all style/size combinations.