size:30cm*24cm*10cm the backpack is fit for 2-4 years old kids whose height is between 80-105cm How to customize the image on the bag ? Step 1:You can send us the image through Aliexpress message or send it to our email . Step2:we will show you the preview of the bag with your picture soon after we receive your image. Step3: if you are satisfied with the preview ,you can make an order.