Boys Girls Shoes
Dear customer:because the size label is different,so choose the correct size,need to measure the foot length,check size information.
Foot length 11.0 cm, recommend insole length 12.0 cm. 
All dimensions are measured manually with deviation (ranged)at 0.5 cm.
If you have any questions, please contact customer service, thank you.
Size 18 Inner length 12.5 cm
Size 19 Inner length 13.0 cm
Size 20 Inner length 13.5 cm
Size 21 Inner length 14.0 cm
Size 22 Inner length 14.5 cm
Size 23 Inner length 15.0 cm
Size 24 Inner length 15.5 cm
Size 25 Inner length 16.0 cm
Size 26 Inner length 16.5 cm
Size 27 Inner length 17.0 cm