Little Blue Lamb Baby Squeaky Shoes, Boys, with Removable Squeaker leather-and-synthetic rubber sole Soft, flexible, synthetic leather upper Authentic leather linings and insole Insole Length: 134mm ; US Size / EUR Size: 4 / 21 Encourage and cultivate your toddler's interest in walking Flexible rubber sole; AND comes with a kilofly mini Gift-for-You Card - Ideal for dropping a few words for that special someone