How to choose size:
Above CM in the colume is the insole length, must be longer 0.5 cm than your children feet length.
One way,For Example, if your children feet length is 15.1cm, you should choose US 9 with EUR 25 size and insole 15.6cm( US size is only a reference, we will shipped the right size according to the insole length )
Please been noted each shoes often have 2-3 CM size tolerance due to all hand measurement.
This is from EUR 26-30 size,lots of stock, do not worry
Attention: we can not make sure how long of the battery can last in the deadline time,Normally we will add one piece battery inside if you add comment, if you need more battery, please buy more pieces
Attention: for the LED, normally we can shipped one more
battery if you buy, you can changed as below step