100% cotton elastic breathable upper makes it easy for new walkers to put on and off,and never comes off while walking.Flexible soft rubber sole which has many grips in the bottom,that prevents from sliding either on a wood floor or tile floor,offers the best protection during indoor activities.These sock/shoes hybrid unique shoes are also great for everyday all year around:spring,summer,fall,winter!

Size Reference:
US Size 4:Sole length:Approx.11cm/4.33inch----Recommend age:6-12 Months
US Size 5:Sole length:Approx.12cm/4.72inch----Recommend age:12-18 Months
US Size 6:Sole length:Approx.13cm/5.12inch----Recommend age:18-24 Months
US Size 7:Sole length:Approx.14cm/5.51inch----Recommend age:24-36 Months

The chart is for reference,please measure your baby's feet to choose the suitable size.