Size:11 Length:11CM Inches:4.3" Age:3~6 Month UK:1.5 US:2.5 <br> <br> Size:12 Length:12CM Inches:4.7" Age:6~9 Month UK:2 US:3 <br> <br> Size:13 Length:13CM Inches:5.1" Age:9~12 Month UK:2.5 US:3.5