... sizes ? The size just according to your final request,but generally,it would be from 1m to 5m ... just depends on the actual size of what you request,for example,if you want to custome a special ... light,it just depends on the size of balloon,for example,2m balloon use 100w light,and all ... could auto inflate,and it needs electricity source for continuous charge!For any other question,please fo feel free ...